Details of the Researcher

PHOTO

Shintaro Ishida
Section
Graduate School of Science
Job title
Associate Professor
Degree
  • 博士(理学)(東北大学)

e-Rad No.
90436080

Research History 5

  • 2016/02 - Present
    Graduate School of Science, Tohoku University Associate Professor

  • 2009/07 - 2016/01
    Graduate School of Science, Tohoku University Lecturer

  • 2006/10 - 2009/06
    Graduate School of Engineering, Gunma University 助教

  • 2006/04 - 2006/09
    Graduate School of Science, Tohoku University 研究員

  • 2003/04 - 2006/03
    Institute for Chemical Research 日本学術振興会特別研究員(PD)

Education 2

  • Tohoku University Graduate School, Division of Natural Science Department of Chemistry

    - 2003/03

  • Tohoku University Faculty of Science

    - 1998/03

Professional Memberships 3

  • The Society of Synthetic Organic Chemistry

  • The Society of Silicon Chemistry

  • The Chemical Society of Japan

Research Interests 4

  • 構造有機化学

  • phosphorus

  • main group elements chemistry

  • Silicon

Research Areas 3

  • Life sciences / Bioorganic chemistry / main group element chemistry

  • Nanotechnology/Materials / Structural/physical organic chemistry / main group element chemistry

  • Nanotechnology/Materials / Structural/physical organic chemistry /

Awards 7

  1. Incentive Award in Synthetic Organic Chemistry

    2015/02/19 有機合成化学協会 二配位高周期15族ラジカルの速度論的安定化および関連化合物の化学

  2. 第17回ケイ素化学協会奨励賞

    2012/10 ケイ素化学協会 安定シリレンの特徴的な反応を利用した新規含ケイ素π電子系の創製

  3. Inoue Research Award for Young Scientists

    2004/02 財団法人井上科学振興財団.

  4. President's Award of Tohoku University

    2003/03 東北大学

  5. 日本化学会第83春期年会学生講演賞

    2003/03 日本化学会

  6. Best Poster Award of Symposium of the Society of Silicon Chemistry

    2002/11 ケイ素化学協会

  7. Best Poster Award of Symposium of the Society of Silicon Chemistry

    1999/11 ケイ素化学協会

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Papers 122

  1. Transformation of a Tetrasila-1,3-dienide to Its Valence Isomers

    Takeaki Iwamoto, Tomoki Ishikawa, Naohiko Akasaka, Shintaro Ishida

    Organometallics 2025/06/23

    DOI: 10.1021/acs.organomet.5c00140  

  2. Synthesis of a dilithiobutadiene bearing extremely bulky silyl substituents and its reactivity toward functionalized silanes

    Katharina Münster, Shunsuke Kudo, Takuya Kuwabara, Eriko Shimamura, Shunsuke Furukawa, Yusuke Yoshida, Shintaro Ishida, Takeaki Iwamoto, Kazuki Tanifuji, Yasuhiro Ohki, Mao Minoura, Masaichi Saito

    Dalton Transactions 2025

    DOI: 10.1039/D4DT03537B  

  3. Catalytic Concerted SNAr Reactions of Fluoroarenes by an Organic Superbase

    Masanori Shigeno, Kazutoshi Hayashi, Ozora Sasamoto, Riku Hirasawa, Toshinobu Korenaga, Shintaro Ishida, Kanako Nozawa-Kumada, Yoshinori Kondo

    Journal of the American Chemical Society 2024/11/27

    DOI: 10.1021/jacs.4c09042  

  4. Isolable Si=B Analogue of a Vinyl Halide: A Building Block for Facile Access toward Silicon-Boron Multiple Bonded Species Peer-reviewed

    Taichi Koike, Naoki Sakurata, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie International Edition e202411283 2024/08

    DOI: 10.1002/anie.202411283  

  5. Metal-catalyzed valence isomerization of a methylene(thioxo)phosphorane to a thiaphosphirane

    Shintaro Ishida, Yusuke Yoshida, Takeaki Iwamoto

    Chemical Communications 60 (63) 8288-8291 2024/07/12

    DOI: 10.1039/d4cc02147a  

    ISSN: 1359-7345

    eISSN: 1364-548X

  6. Selective Synthesis of New Hexaalkylbicyclo[1.1.1]Pentasilanes with Improved Solubility

    Yukihiro Morino, Shintaro Ishida, Takeaki Iwamoto

    Zeitschrift fur Anorganische und Allgemeine Chemie 650 (11-12) 2024/06/03

    DOI: 10.1002/zaac.202400056  

    ISSN: 0044-2313

    eISSN: 1521-3749

  7. An Isolable THF‐Coordinated Dialkylgermanone

    Kazuma Oshima, Ryo Kobayashi, Kengo Sakamoto, Kenji Yoza, Shintaro Ishida, Takeaki Iwamoto

    Chemistry – An Asian Journal 19 (9) 2024/05/02

    DOI: 10.1002/asia.202400111  

    ISSN: 1861-4728

    eISSN: 1861-471X

  8. Synthesis of Phosphinoboranes via Coordination-Induced Bromine Abstraction of an Isolable Phosphinyl Radical with Bromoboranes

    Shintaro Ishida, Yasuhiro Katayama, Fumiya Hirakawa, Takeaki Iwamoto

    Synthesis (Germany) 2024

    DOI: 10.1055/a-2270-0665  

    ISSN: 0039-7881

    eISSN: 1437-210X

  9. Partial and Complete Replacement of the Phenyl Group(s) of 1,1,3,3-Tetraphenyl-2,2,4,4-tetrakis(trimethylsilyl)cyclotetrasilane by Chlorine Atom(s)

    Shintaro Ishida, Yosuke Ishii, Tetsuya Fukasawa, Soichiro Kyushin

    Chemistry - A European Journal 29 (70) 2023/12/14

    DOI: 10.1002/chem.202302479  

    ISSN: 0947-6539

    eISSN: 1521-3765

  10. Coordination‐Induced Migration of Aryl Groups in the Reactions of a Dialkylsilanone with a Series of Triarylboranes

    Shintaro Ishida, Kengo Sakamoto, Ryo Kobayashi, Takeaki Iwamoto

    Chemistry – An Asian Journal 18 (13) 2023/07/03

    DOI: 10.1002/asia.202300307  

    ISSN: 1861-471X 1861-4728

    eISSN: 1861-471X

  11. Silacyclopropenylsilylene-NHC Complex: Synthesis by (1+2) Retro-cycloaddition, Dynamic Behavior in Solution, and Ring-expansion Reaction

    Yanagisawa, D., Ishida, S., Iwamoto, T.

    Chemistry Letters 52 (2) 124-127 2023

    DOI: 10.1246/cl.220528  

    ISSN: 1348-0715 0366-7022

    eISSN: 1348-0715

  12. Dearomative Cycloaddition of an Isolable Dialkylsilylene with Diaryl Ketones

    Kenya Uchida, Shintaro Ishida, Takeaki Iwamoto

    European Journal of Organic Chemistry 2022 (24) 2022/06/27

    DOI: 10.1002/ejoc.202200522  

    ISSN: 1099-0690 1434-193X

  13. Synthesis, Structure and Electronic Properties of a Stable π‐Type 3‐Electron‐2‐Center‐Bonded Species: A Silicon Analogue of a Bicyclo[1.1.0]butane Radical Anion

    Taichi Koike, Raiki Osawa, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie 134 (20) 2022/05/09

    Publisher: Wiley

    DOI: 10.1002/ange.202117584  

    ISSN: 0044-8249

    eISSN: 1521-3757

  14. Synthesis, Structure and Electronic Properties of a Stable π‐Type 3‐Electron‐2‐Center‐Bonded Species: A Silicon Analogue of a Bicyclo[1.1.0]butane Radical Anion

    Taichi Koike, Raiki Osawa, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie International Edition 61 (20) 2022/05/09

    Publisher: Wiley

    DOI: 10.1002/anie.202117584  

    ISSN: 1433-7851

    eISSN: 1521-3773

  15. Silyl(silylene) Coinage Metal Complexes Obtained from Isolable Cyclic Alkylsilylenes

    Shunya Abe, Yuichiro Inagawa, Ryo Kobayashi, Shintaro Ishida, Takeaki Iwamoto

    Organometallics 41 (7) 874-882 2022/04/11

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.organomet.2c00040  

    ISSN: 1520-6041 0276-7333

  16. A Thermally Robust Cyclic Dialkylsilylene

    Abe, T., Ishida, S., Iwamoto, T.

    Bulletin of the Chemical Society of Japan 95 (1) 2022

    DOI: 10.1246/bcsj.20210399  

    ISSN: 1348-0634 0009-2673

  17. Skeletal isomerism within 1,3-disilabicyclo[1.1.0]butane and 2,3-disilabuta-1,3-diene derivatives

    Iwamoto, T., Kobayashi, A., Akasaka, N., Ishida, S.

    Mendeleev Communications 32 (1) 2022

    DOI: 10.1016/j.mencom.2022.01.012  

    ISSN: 1364-551X 0959-9436

  18. Construction of 1,2,3-Benzodiazaborole by Electrophilic Borylation of Azobenzene and Nucleophilic Dialkylative Cyclization

    Shigeno, M., Imamatsu, M., Kai, Y., Kiriyama, M., Ishida, S., Nozawa-Kumada, K., Kondo, Y.

    Organic Letters 23 (20) 8023-8027 2021/10/15

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.orglett.1c03033  

    ISSN: 1523-7052 1523-7060

    eISSN: 1523-7052

  19. Lithiated 1,3-Disilabicyclo[1.1.0]butanes Synthesized via Selective Cleavage of Exocyclic Si–Si Bonds on Bridgehead Silicon Atoms

    Takeaki Iwamoto, Dongzhu Yin, Akifumi Kobayashi, Makoto Tamura, Daiki Motomatsu, Naohiko Akasaka, Yuki Yokouchi, Shintaro Ishida, Mitsuo Kira

    Organometallics 40 (15) 2021/08/09

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.organomet.1c00284  

    ISSN: 1520-6041 0276-7333

  20. Reply to: “A double bond with weak σ- and strong π-interactions is still a double bond”

    Soichiro Kyushin, Yoshikuni Kurosaki, Kyohei Otsuka, Haruna Imai, Shintaro Ishida, Toru Kyomen, Minoru Hanaya, Hideyuki Matsumoto

    Nature Communications 2021/06/29

    DOI: 10.1038/s41467-021-24239-w  

  21. Synthesis of an NHC-Coordinated Dialkyldisilavinylidene and Its Oxidation Providing a Silicon Analog of an Acetolactone

    Kobayashi, R., Ishida, S., Iwamoto, T.

    Organometallics 40 (7) 843-847 2021/04/12

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/acs.organomet.1c00130  

    ISSN: 1520-6041 0276-7333

    eISSN: 1520-6041

  22. A spiropentasiladiene radical cation: Spin and positive charge delocalization across two perpendicular Si=Si bonds and UV-vis- NIR absorption in the IR-B region

    Honda, S., Sugawara, R., Ishida, S., Iwamoto, T.

    Journal of the American Chemical Society 143 (7) 2649-2653 2021/02/24

    Publisher: American Chemical Society ({ACS})

    DOI: 10.1021/jacs.0c12426  

    ISSN: 1520-5126 0002-7863

    eISSN: 1520-5126

  23. An isolable bromosilene: Synthesis, structure, and substitution reactions

    Honda, S., Kato, Y., Ishida, S., Iwamoto, T.

    Chemistry Letters 50 (5) 2021/01/20

    Publisher: The Chemical Society of Japan

    DOI: 10.1246/cl.200968  

    ISSN: 1348-0715 0366-7022

    eISSN: 1348-0715

  24. Dialkylboryl-substituted cyclic disilenes synthesized by desilylation-borylation of trimethylsilyl-substituted disilenes

    Tanaka, K., Akasaka, N., Kosai, T., Honda, S., Ushijima, Y., Ishida, S., Iwamoto, T.

    Molecules 26 (6) 1632-1632 2021

    Publisher: MDPI AG

    DOI: 10.3390/molecules26061632  

    ISSN: 1420-3049

    eISSN: 1420-3049

  25. Cleavage of C-O and C-H bonds in ethers by a genuine SiO bond Peer-reviewed

    Kobayashi, R., Ishida, S., Iwamoto, T.

    Dalton Transactions 50 (4) 1413-1421 2021

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/d0dt04240d  

    ISSN: 1477-9234 1477-9226

    eISSN: 1477-9234

  26. Cycloaddition of a Cyclic (Alkyl)(amino)silylene and a Disilyne Providing a 3-Aminocyclotrisilene Peer-reviewed

    Koike, T., Honda, S., Ishida, S., Iwamoto, T.

    Organometallics 39 (23) 4149-4152 2020/12/14

    DOI: 10.1021/acs.organomet.9b00828  

    ISSN: 1520-6041 0276-7333

    eISSN: 1520-6041

  27. Naphtho-and anthra-disilacyclobutadienes Peer-reviewed

    Ishida, S., Sugawara, S., Honda, S., Iwamoto, T.

    Chemical Communications 56 (95) 15072-15075 2020/12/11

    DOI: 10.1039/d0cc06603f  

    ISSN: 1364-548X 1359-7345

    eISSN: 1364-548X

  28. A Six-Coordinate Silicon Dihydride Embedded in a Porphyrin: Enhanced Hydride-Donor Properties and the Catalyst-Free Hydrosilylation of CO<inf>2</inf> Peer-reviewed

    Ishida, S., Hatakeyama, T., Nomura, T., Matsumoto, M., Yoshimura, K., Kyushin, S., Iwamoto, T.

    Chemistry - A European Journal 26 (68) 15811-15815 2020/12/04

    DOI: 10.1002/chem.202002587  

    ISSN: 1521-3765 0947-6539

    eISSN: 1521-3765

  29. Trialkylphosphines having a bulky phosphacyclopentane backbone: Structural and redox properties depending on the exocyclic alkyl groups and EPR observation of a persistent trialkylphosphine radical cation Peer-reviewed

    Hirakawa, F., Nakagawa, H., Honda, S., Ishida, S., Iwamoto, T.

    Journal of Organic Chemistry 85 (22) 14634-14642 2020/11/20

    DOI: 10.1021/acs.joc.0c01393  

    ISSN: 1520-6904 0022-3263

    eISSN: 1520-6904

  30. Silicon–silicon π single bond Peer-reviewed

    Soichiro Kyushin, Yoshikuni Kurosaki, Kyohei Otsuka, Haruna Imai, Shintaro Ishida, Toru Kyomen, Minoru Hanaya, Hideyuki Matsumoto

    Nature Communications 11 (1) 2020/08/11

    DOI: 10.1038/s41467-020-17815-z  

    eISSN: 2041-1723

  31. Corrigendum to: A Potassium Diboryllithate: Synthesis, Bonding Properties, and the Deprotonation of Benzene (Angewandte Chemie International Edition, (2016), 55, 38, (11426-11430), 10.1002/anie.201605005)

    Takuto Ohsato, Yuri Okuno, Shintaro Ishida, Takeaki Iwamoto, Ka Ho Lee, Zhenyang Lin, Makoto Yamashita, Kyoko Nozaki

    Angewandte Chemie - International Edition 59 (32) 13149 2020/08/03

    DOI: 10.1002/anie.202009063  

    ISSN: 1433-7851

    eISSN: 1521-3773

  32. Structures and Properties of Phenylene-Bridged 1,3-Diaza-2-silole and Related 2H-Azasilirenes Obtained by the Reactions of a Dialkylsilylene with Arylnitriles Peer-reviewed

    Ishida, S., Uchida, K., Mori, M., Iwamoto, T.

    European Journal of Inorganic Chemistry 2019 (29) 3366-3372 2019/08/07

    Publisher: Wiley

    DOI: 10.1002/ejic.201900590  

    ISSN: 1099-0682 1434-1948

    eISSN: 1099-0682

  33. Titelbild: An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond (Angew. Chem. 28/2019) Peer-reviewed

    Ryo Kobayashi, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie 131 (28) 9391-9391 2019/07/08

    Publisher: Wiley

    DOI: 10.1002/ange.201906778  

  34. Cover Picture: An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond (Angew. Chem. Int. Ed. 28/2019) Peer-reviewed

    Ryo Kobayashi, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie International Edition 58 (28) 9291-9291 2019/07/08

    Publisher: Wiley

    DOI: 10.1002/anie.201906778  

  35. An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond Peer-reviewed

    Ryo Kobayashi, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie - International Edition 58 (28) 9425-9428 2019/07/08

    Publisher: Wiley

    DOI: 10.1002/anie.201905198  

    ISSN: 1433-7851

    eISSN: 1521-3773

  36. An Isolable Silicon Analogue of a Ketone that Contains an Unperturbed Si=O Double Bond Peer-reviewed

    Ryo Kobayashi, Shintaro Ishida, Takeaki Iwamoto

    Angewandte Chemie 131 (28) 9525 2019/07

    Publisher: Wiley

    DOI: 10.1002/ange.201905198  

  37. A Tetrasilicon Analogue of Bicyclo[1.1.0]but-1(3)-ene Containing a Si=Si Double Bond with an Inverted Geometry Peer-reviewed

    Takeaki Iwamoto, Takashi Abe, Kunihisa Sugimoto, Daisuke Hashizume, Hiroshi Matsui, Ryohei Kishi, Masayoshi Nakano, Shintaro Ishida

    Angewandte Chemie - International Edition 58 (13) 4371-4375 2019/03/22

    DOI: 10.1002/anie.201900824  

    ISSN: 1433-7851

    eISSN: 1521-3773

  38. Virtual reaction condition optimization based on machine learning for a small number of experiments in high-dimensional continuous and discrete variables Peer-reviewed

    Mikito Fujinami, Junji Seino, Takumi Nukazawa, Shintaro Ishida, Takeaki Iwamoto, Hiromi Nakai

    Chemistry Letters 48 (8) 961-964 2019

    DOI: 10.1246/cl.190267  

    ISSN: 0366-7022

    eISSN: 1348-0715

  39. Reactions of a tetrasilabicyclo[1.1.0]but-1(3)-ene with carbon tetrachloride and methanol Peer-reviewed

    Takumi Nukazawa, Tomoyuki Kosai, Shunya Honda, Shintaro Ishida, Takeaki Iwamoto

    Dalton Transactions 48 (29) 10874-10880 2019

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/c9dt01627a  

    ISSN: 1477-9226

    eISSN: 1477-9234

  40. Transformative Si<inf>8</inf>R<inf>8</inf> siliconoids Peer-reviewed

    Naohiko Akasaka, Shintaro Ishida, Takeaki Iwamoto

    Inorganics 6 (4) 2018/12/01

    DOI: 10.3390/inorganics6040107  

    eISSN: 2304-6740

  41. Alkoxy(tetraaryl)silicates bearing 9,10-disilatriptycene skeleton Peer-reviewed

    Shintaro Ishida, Minori Takiguchi, Takeaki Iwamoto

    Heteroatom Chemistry 29 (5-6) e21481 2018/12

    Publisher: Wiley

    DOI: 10.1002/hc.21481  

    ISSN: 1042-7163

    eISSN: 1098-1071

  42. Facile skeletal rearrangement of polycyclic disilenes with bicyclo[1.1.1]pentasilanyl groups Peer-reviewed

    Yuki Yokouchi, Shintaro Ishida, Takeaki Iwamoto

    Chemistry - A European Journal 24 (44) 11393-11401 2018/08/06

    Publisher: Wiley

    DOI: 10.1002/chem.201801517  

    ISSN: 0947-6539

    eISSN: 1521-3765

  43. Synthesis and functionalization of a 1,2-bis(trimethylsilyl)-1,2-disilacyclohexene that can serve as a unit of cis-1,2-dialkyldisilene Peer-reviewed

    Naohiko Akasaka, Kaho Tanaka, Shintaro Ishida, Takeaki Iwamoto

    Inorganics 6 (1) 2018/03/01

    Publisher: MDPI Multidisciplinary Digital Publishing Institute

    DOI: 10.3390/inorganics6010021  

    ISSN: 2304-6740

    eISSN: 2304-6740

  44. Structural change upon one-electron reduction of an isolable dialkylsilylene Peer-reviewed

    Takashi Abe, Shintaro Ishida, Takeaki Iwamoto

    Bulletin of the Chemical Society of Japan 91 (4) 684-686 2018

    DOI: 10.1246/bcsj.20170380  

    ISSN: 0009-2673

    eISSN: 1348-0634

  45. A series of two-coordinate group-15 element (P, As, Sb, Bi) centered radicals having bulky alkyl groups Peer-reviewed

    Shintaro Ishida, Fumiya Hirakawa, Takeaki Iwamoto

    Bulletin of the Chemical Society of Japan 91 (7) 1168-1175 2018

    DOI: 10.1246/bcsj.20180057  

    ISSN: 0009-2673

    eISSN: 1348-0634

  46. Dearomative cycloadditions of a silylene with pyrazine and quinoxaline Peer-reviewed

    Shintaro Ishida, Tomofumi Tamura, Takeaki Iwamoto

    Dalton Transactions 47 (33) 11317-11321 2018

    Publisher: Royal Society of Chemistry ({RSC})

    DOI: 10.1039/c8dt02802h  

    ISSN: 1477-9226

    eISSN: 1477-9234

  47. Facile synthesis and bridgehead-functionalization of bicyclo[3.3.3]pentasiloxanes Peer-reviewed

    Yuki Yokouchi, Shintaro Ishida, Tsunenobu Onodera, Hidetoshi Oikawa, Takeaki Iwamoto

    Chemical Communications 54 (3) 268-270 2018

    Publisher: Royal Society of Chemistry

    DOI: 10.1039/c7cc08790j  

    ISSN: 1359-7345

    eISSN: 1364-548X

  48. Benzodisilacyclobutadienes: 8π-Electron Systems with an Antiaromatic Silicon Ring Peer-reviewed

    Shintaro Ishida, Yoshifumi Misawa, Shohei Sugawara, Takeaki Iwamoto

    Angewandte Chemie 129 (44) 14017 2017/10

    Publisher: Wiley-Blackwell

    DOI: 10.1002/ange.201707553  

  49. Benzodisilacyclobutadienes: 8 pi-Electron Systems with an Antiaromatic Silicon Ring Peer-reviewed

    Shintaro Ishida, Yoshifumi Misawa, Shohei Sugawara, Takeaki Iwamoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 56 (44) 13829-13832 2017/10

    DOI: 10.1002/anie.201707553  

    ISSN: 1433-7851

    eISSN: 1521-3773

  50. Heteroaryldisilenes: heteroaryl groups serve as electron acceptors for Si=Si double bonds in intramolecular charge transfer transitions Peer-reviewed

    Tomoyuki Kosai, Shintaro Ishida, Takeaki Iwamoto

    DALTON TRANSACTIONS 46 (34) 11271-11281 2017/09

    DOI: 10.1039/c7dt02357j  

    ISSN: 1477-9226

    eISSN: 1477-9234

  51. Heteroaryldisilenes: heteroaryl groups serve as electron acceptors for Si=Si double bonds in intramolecular charge transfer transitions Peer-reviewed

    Tomoyuki Kosai, Shintaro Ishida, Takeaki Iwamoto

    DALTON TRANSACTIONS 46 (34) 11271-11281 2017/09

    DOI: 10.1039/c7dt02357j  

    ISSN: 1477-9226

    eISSN: 1477-9234

  52. Stable Silylenes and Their Transition Metal Complexes Peer-reviewed

    Takeaki Iwamoto, Shintaro Ishida

    Organosilicon Compounds: Theory and Experiment (Synthesis) 361-532 2017/08/21

    Publisher: Elsevier Inc.

    DOI: 10.1016/B978-0-12-801981-8.00008-3  

  53. A 1,2-Dibromosilene: Generation, Spectroscopic Observation, and Isomerization to a Silacyclohexane via Facile 1,2-Bromine Shift Peer-reviewed

    Shintaro Ishida, Yushi Kato, Takeaki Iwamoto

    CHEMISTRY LETTERS 46 (8) 1164-1166 2017/08

    DOI: 10.1246/cl.170409  

    ISSN: 0366-7022

    eISSN: 1348-0715

  54. Coordination-induced Hydrogen Abstraction in the Reactions of a Stable Dialkylphosphinyl Radical with BH3-Lewis Base Adducts Peer-reviewed

    Shintaro Ishida, Hitomi Ichikawa, Takeaki Iwamoto

    CHEMISTRY LETTERS 46 (6) 883-885 2017/06

    DOI: 10.1246/cl.170248  

    ISSN: 0366-7022

    eISSN: 1348-0715

  55. An Isolable Potassium Salt of a Borasilene-Chloride Adduct Peer-reviewed

    Yuko Suzuki, Shintaro Ishida, Sota Sato, Hiroyuki Isobe, Takeaki Iwamoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 56 (16) 4593-4597 2017/04

    DOI: 10.1002/anie.201612545  

    ISSN: 1433-7851

    eISSN: 1521-3773

  56. Isolation and Characterization of Radical Anions Derived from a Boryl-Substituted Diphosphene Peer-reviewed

    Shun-suke Asami, Shintaro Ishida, Takeaki Iwamoto, Katsunori Suzuki, Makoto Yamashita

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 56 (6) 1658-1662 2017/02

    DOI: 10.1002/anie.201611762  

    ISSN: 1433-7851

    eISSN: 1521-3773

  57. Pentasila-1,4-diene: Homoconjugation between Si=Si Double Bonds via a SiMe2 Unit Peer-reviewed

    Tomoyuki Kosai, Shintaro Ishida, Takeaki Iwamoto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139 (1) 99-102 2017/01

    DOI: 10.1021/jacs.6b11912  

    ISSN: 0002-7863

  58. A Two-Coordinate Cyclic (Alkyl)(amino)silylene: Balancing Thermal Stability and Reactivity Peer-reviewed

    Tomoyuki Kosai, Shintaro Ishida, Takeaki Iwamoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 55 (50) 15554-15558 2016/12

    DOI: 10.1002/anie.201608736  

    ISSN: 1433-7851

    eISSN: 1521-3773

  59. A Potassium Diboryllithate: Synthesis, Bonding Properties, and the Deprotonation of Benzene Peer-reviewed

    Takuto Ohsato, Yuri Okuno, Shintaro Ishida, Takeaki Iwamoto, Ka-Ho Lee, Zhenyang Lin, Makoto Yamashita, Kyoko Nozaki

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 55 (38) 11426-11430 2016/09

    DOI: 10.1002/anie.201605005  

    ISSN: 1433-7851

    eISSN: 1521-3773

  60. Recent advances in eta(2)-disilene and eta(2)-disilyne mononuclear transition metal complexes and related compounds Peer-reviewed

    Shintaro Ishida, Takeaki Iwamoto

    COORDINATION CHEMISTRY REVIEWS 314 34-63 2016/05

    DOI: 10.1016/j.ccr.2015.11.007  

    ISSN: 0010-8545

    eISSN: 1873-3840

  61. Hydrogen Bonds-Enabled Design of a C-1-Symmetric Chiral Bronsted Acid Catalyst Peer-reviewed

    Norie Momiyama, Kosuke Funayama, Hirofumi Noda, Masahiro Yamanaka, Naohiko Akasaka, Shintaro Ishida, Takeaki Iwamoto, Masahiro Terada

    ACS CATALYSIS 6 (2) 949-956 2016/02

    DOI: 10.1021/acscatal.5b02079  

    ISSN: 2155-5435

  62. Ferrocenyl-substituted Bicyclo[1.1.1]pentasilanes: Evaluation of Significant Interactions between Ferrocenyl Units and Rigid Silicon Cages Peer-reviewed

    Yusuke Kishimoto, Shintaro Ishida, Takeaki Iwamoto

    CHEMISTRY LETTERS 45 (2) 235-237 2016/02

    DOI: 10.1246/cl.151089  

    ISSN: 0366-7022

    eISSN: 1348-0715

  63. Persistent four-coordinate iron-centered radical stabilized by pi-donation Peer-reviewed

    Yusuke Sunada, Shintaro Ishida, Fumiya Hirakawa, Yoshihito Shiota, Kazunari Yoshizawa, Shinji Kanegawa, Osamu Sato, Hideo Nagashimaad, Takeaki Iwamoto

    CHEMICAL SCIENCE 7 (1) 191-198 2016

    DOI: 10.1039/c5sc02601f  

    ISSN: 2041-6520

    eISSN: 2041-6539

  64. Persistent Dialkylsilanone Generated by Dehydrobromination of Dialkylbromosilanol Peer-reviewed

    Shintaro Ishida, Takashi Abe, Fumiya Hirakawa, Tomoyuki Kosai, Katsuhiro Sato, Mitsuo Kira, Takeaki Iwamoto

    CHEMISTRY-A EUROPEAN JOURNAL 21 (43) 15100-15103 2015/10

    DOI: 10.1002/chem.201501478  

    ISSN: 0947-6539

    eISSN: 1521-3765

  65. Phosphorus-centered Radical Stabilized by Bulky Alkyl Group and Related Compounds Peer-reviewed

    Shintaro Ishida

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN 73 (9) 885-894 2015/09

    ISSN: 0037-9980

  66. Redox Reactions of a Stable Dialkylphosphinyl Radical Peer-reviewed

    Fumiya Hirakawa, Hitomi Ichikawa, Shintaro Ishida, Takeaki Iwamoto

    ORGANOMETALLICS 34 (12) 2714-2716 2015/06

    DOI: 10.1021/acs.organomet.5b00323  

    ISSN: 0276-7333

    eISSN: 1520-6041

  67. An Isolable Radical Anion of an Organosilicon Cluster Containing Only sigma Bonds Peer-reviewed

    Kyohei Otsuka, Naozumi Matsumoto, Shintaro Ishida, Soichiro Kyushin

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 54 (27) 7833-7836 2015/06

    DOI: 10.1002/anie.201500523  

    ISSN: 1433-7851

    eISSN: 1521-3773

  68. Transformation of azulenes to bicyclic [4]dendralene and heptafulvene derivatives via photochemical cycloaddition of dialkylsilylene Peer-reviewed

    Tomoyuki Kosai, Shintaro Ishida, Takeaki Iwamoto

    CHEMICAL COMMUNICATIONS 51 (53) 10707-10709 2015

    DOI: 10.1039/c5cc03424h  

    ISSN: 1359-7345

    eISSN: 1364-548X

  69. Reactions of a Stable Phosphinyl Radical with Stable Aminoxyl Radicals Peer-reviewed

    Shintaro Ishida, Fumiya Hirakawa, Takeaki Iwamoto

    CHEMISTRY LETTERS 44 (1) 94-96 2015/01

    DOI: 10.1246/cl.140885  

    ISSN: 0366-7022

    eISSN: 1348-0715

  70. Unexpected Formation of Highly Strained 2,5-Dioxa-3-Silabicyclo[2.1.0] Pentane by the Reaction of Isolable Dialkylsilylene with Benzil Peer-reviewed

    Shintaro Ishida, Kenya Uchida, Takeaki Iwamoto

    HETEROATOM CHEMISTRY 25 (5) 348-353 2014/11

    DOI: 10.1002/hc.21162  

    ISSN: 1042-7163

    eISSN: 1098-1071

  71. A heavy analogue of the smallest bridgehead alkene stabilized by a base Peer-reviewed

    Takeaki Iwamoto, Naohiko Akasaka, Shintaro Ishida

    NATURE COMMUNICATIONS 5 5353 2014/11

    DOI: 10.1038/ncomms6353  

    ISSN: 2041-1723

  72. Two-coordinate Dialkylsilylene-Coinage Metal Complexes Peer-reviewed

    Yuichiro Inagawa, Shintaro Ishida, Takeaki Iwamoto

    CHEMISTRY LETTERS 43 (10) 1665-1667 2014/10

    DOI: 10.1246/cl.140651  

    ISSN: 0366-7022

    eISSN: 1348-0715

  73. Persistent Antimony- and Bismuth-Centered Radicals in Solution Peer-reviewed

    Shintaro Ishida, Fumiya Hirakawa, Ko Furukawa, Kenji Yoza, Takeaki Iwamoto

    Angewandte Chemie - International Edition 53 (42) 11172-11176 2014/10/01

    Publisher: Wiley-VCH Verlag

    DOI: 10.1002/anie.201405509  

    ISSN: 1521-3773 1433-7851

  74. Two Pentasilahousanes Fused Together Peer-reviewed

    Akihiro Tsurusaki, Makoto Koganezono, Kyohei Otsuka, Shintaro Ishida, Soichiro Kyushin

    CHEMISTRY-A EUROPEAN JOURNAL 20 (30) 9263-9266 2014/07

    DOI: 10.1002/chem.201403375  

    ISSN: 0947-6539

    eISSN: 1521-3765

  75. Isolable 2,3-Disila-1,3-butadiene from a Double Sila-Peterson Reaction Peer-reviewed

    Daiki Motomatsu, Shintaro Ishida, Koichi Ohno, Takeaki Iwamoto

    CHEMISTRY-A EUROPEAN JOURNAL 20 (30) 9424-9430 2014/07

    DOI: 10.1002/chem.201402868  

    ISSN: 0947-6539

    eISSN: 1521-3765

  76. Germanium-centered free radicals studied by muon spin spectroscopy Peer-reviewed

    Robert West, Kerim Samedov, Amitabha Mitra, Paul W. Percival, Jean-Claude Brodovitch, Graeme Langille, Brett M. McCollum, Takeaki Iwamoto, Shintaro Ishida, Cameron Jones, Jiaye Li

    CANADIAN JOURNAL OF CHEMISTRY 92 (6) 508-513 2014/06

    DOI: 10.1139/cjc-2013-0427  

    ISSN: 0008-4042

    eISSN: 1480-3291

  77. Silylation Improves the Photodynamic Activity of Tetraphenylporphyrin Derivatives In Vitro and In Vivo Peer-reviewed

    Hiroaki Horiuchi, Masahiro Hosaka, Hiroyuki Mashio, Motoki Terata, Shintaro Ishida, Soichiro Kyushin, Tetsuo Okutsu, Toshiyuki Takeuchi, Hiroshi Hiratsuka

    CHEMISTRY-A EUROPEAN JOURNAL 20 (20) 6054-6060 2014/05

    DOI: 10.1002/chem.201303120  

    ISSN: 0947-6539

    eISSN: 1521-3765

  78. Silicon Compounds with Inverted Geometry around Silicon Atoms Peer-reviewed

    Takeaki Iwamoto, Shintaro Ishida

    CHEMISTRY LETTERS 43 (2) 164-170 2014/02

    DOI: 10.1246/cl.130856  

    ISSN: 0366-7022

    eISSN: 1348-0715

  79. Effect of Ring Sizes of Cyclooligosilanes on Construction of Organosilicon Clusters

    Kyushin Soichiro, Ishida Shintaro, Tsurusaki Akihiro, Otsuka Kyohei

    J. Synth. Org. Chem. Jpn. 72 (11) 1290-1297 2014

    Publisher: The Society of Synthetic Organic Chemistry, Japan

    DOI: 10.5059/yukigoseikyokaishi.72.1290  

    ISSN: 0037-9980

    More details Close

    The degree of oligomerization in the Wurtz-type coupling of 1,1,2,2-tetrachlorocyclooligosilanes was found to be controlled by the ring sizes of the cyclooligosilanes. The Wurtz-type coupling of 1,1,2,2-tetrachlorocyclotetrasilane, -cyclopentasilane, and -cyclohexasilane gave a tetramer, a trimer, and a dimer, respectively. These oligomers are the first examples of octasilacuneane, hexasilabenzvalene, and bicyclo[4.1.0]heptasil-1(6)-ene derivatives.

  80. Near-IR absorbing nickel(II) porphyrinoids prepared by regioselective insertion of silylenes into antiaromatic nickel(II) norcorrole Peer-reviewed

    Fukuoka, T., Uchida, K., Sung, Y.M., Shin, J.-Y., Ishida, S., Lim, J.M., Hiroto, S., Furukawa, K., Kim, D., Iwamoto, T., Shinokubo, H.

    Angewandte Chemie - International Edition 53 (6) 1506-1509 2014

    DOI: 10.1002/anie.201309921  

  81. Multiple Bonds with Silicon: Recent Advances in Synthesis, Structure, and Functions of Stable Disilenes Peer-reviewed

    Takeaki Iwamoto, Shintaro Ishida

    FUNCTIONAL MOLECULAR SILICON COMPOUNDS II: LOW OXIDATION STATES 156 125-202 2014

    DOI: 10.1007/430_2013_119  

    ISSN: 0081-5993

  82. Palladium and Platinum eta(2)-Disilyne Complexes Bearing an Isolable Dialkyldisilyne as a Ligand Peer-reviewed

    Shintaro Ishida, Ryutaro Sugawara, Yoshifumi Misawa, Takeaki Iwamoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 52 (49) 12869-12873 2013/12

    DOI: 10.1002/anie.201308517  

    ISSN: 1433-7851

    eISSN: 1521-3773

  83. Anthryl-substituted 3-silylene-2-silaaziridine obtained by isomerization of disilacyclopropanimine: An exocyclic silene showing a distinct intramolecular charge transfer transition Peer-reviewed

    Takeaki Iwamoto, Nobuyoshi Ohnishi, Naohiko Akasaka, Koichi Ohno, Shintaro Ishida

    Journal of the American Chemical Society 135 (29) 10606-10609 2013/07/24

    DOI: 10.1021/ja404045f  

    ISSN: 0002-7863 1520-5126

  84. Microwave-Assisted Efficient One-Pot Synthesis of 9-Phenyl-9,10-disilatriptycene and Its Bridgehead Functionalization Peer-reviewed

    Takayoshi Kuribara, Shintaro Ishida, Takako Kudo, Soichiro Kyushin

    ORGANOMETALLICS 32 (7) 2092-2098 2013/04

    DOI: 10.1021/om301170r  

    ISSN: 0276-7333

    eISSN: 1520-6041

  85. An Organosilicon Cluster with an Octasilacuneane Core: A Missing Silicon Cage Motif Peer-reviewed

    Shintaro Ishida, Kyohei Otsuka, Yuki Toma, Soichiro Kyushin

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 52 (9) 2507-2510 2013

    DOI: 10.1002/anie.201208506  

    ISSN: 1433-7851

  86. New Isolable Dialkylsilylene and Its Isolable Dimer That Equilibrate in Solution Peer-reviewed

    Takashi Abe, Ryoji Tanaka, Shintaro Ishida, Mitsuo Kira, Takeaki Iwamoto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 134 (49) 20029-20032 2012/12

    DOI: 10.1021/ja310391m  

    ISSN: 0002-7863

  87. Siloxy-Substituted Cyclopentadiene Showing Aggregation-Enhanced Emission: An Application of Cycloaddition of Isolable Dialkylsilylene Peer-reviewed

    Shintaro Ishida, Kenya Uchida, Tsunenobu Onodera, Hidetoshi Oikawa, Mitsuo Kira, Takeaki Iwamoto

    ORGANOMETALLICS 31 (17) 5983-5985 2012/09

    DOI: 10.1021/om3005178  

    ISSN: 0276-7333

    eISSN: 1520-6041

  88. A Light-emitting Liquid Crystal Containing p-Terphenyl and an Alkylsilyl Group Peer-reviewed

    Kyohei Otsuka, Shintaro Ishida, Soichiro Kyushin

    CHEMISTRY LETTERS 41 (3) 307-309 2012/03

    DOI: 10.1246/cl.2012.307  

    ISSN: 0366-7022

    eISSN: 1348-0715

  89. 1,1,4,4-Tetra-tert-butyl-1,4-dichloro-2,2,3,3-tetraphenyltetrasilane Peer-reviewed

    Kyohei Otsuka, Shintaro Ishida, Soichiro Kyushin

    ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE 68 (2) O424-U829 2012/02

    DOI: 10.1107/S1600536812000669  

    ISSN: 1600-5368

  90. A Two-Coordinate Palladium Complex with Two Dialkylphosphinyl Ligands Peer-reviewed

    Takeaki Iwamoto, Fumiya Hirakawa, Shintaro Ishida

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 51 (48) 12111-12114 2012

    DOI: 10.1002/anie.201206997  

    ISSN: 1433-7851

  91. Persilastaffanes: Design, Synthesis, Structure, and Conjugation between Silicon Cages Peer-reviewed

    Takeaki Iwamoto, Daisuke Tsushima, Eunsang Kwon, Shintaro Ishida, Hiroyuki Isobe

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 51 (10) 2340-2344 2012

    DOI: 10.1002/anie.201106422  

    ISSN: 1433-7851

  92. A Stable Dialkylphosphinyl Radical Peer-reviewed

    Shintaro Ishida, Fumiya Hirakawa, Takeaki Iwamoto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 133 (33) 12968-12971 2011/08

    DOI: 10.1021/ja205001m  

    ISSN: 0002-7863

  93. Addition of a Stable Dialkylsilylene to Carbon-Carbon Unsaturated Bonds Peer-reviewed

    Shintaro Ishida, Takeaki Iwamoto, Mitsuo Kira

    HETEROATOM CHEMISTRY 22 (3-4) 432-437 2011

    DOI: 10.1002/hc.20705  

    ISSN: 1042-7163

  94. Reactions of an Isolable Dialkylsilylene with Ketones Peer-reviewed

    Shintaro Ishida, Takeaki Iwamoto, Mitsuo Kira

    ORGANOMETALLICS 29 (21) 5526-5534 2010/11

    DOI: 10.1021/om1004644  

    ISSN: 0276-7333

  95. Synthesis and properties of 5,10,15,20-tetrakis[4-(alkoxysilyl)phenyl]porphyrins: an application of selective deprotection of benzaldehyde diethyl acetals in the presence of alkoxysilyl groups Peer-reviewed

    Shintaro Ishida, Masayasu Ito, Hiroaki Horiuchi, Hiroshi Hiratsuka, Soshi Shiraishi, Soichiro Kyushin

    DALTON TRANSACTIONS 39 (39) 9421-9426 2010

    DOI: 10.1039/c0dt00427h  

    ISSN: 1477-9226

  96. Synthesis and structure of stable base-free dialkylsilanimines Peer-reviewed

    Takeaki Iwamoto, Nobuyoshi Ohnishi, Zhenyu Gui, Shintaro Ishida, Hiroyuki Isobe, Satoshi Maeda, Koichi Ohno, Mitsuo Kira

    NEW JOURNAL OF CHEMISTRY 34 (8) 1637-1645 2010

    DOI: 10.1039/c0nj00121j  

    ISSN: 1144-0546

  97. Unusual Bonding in Trisilaallene and Related Heavy Allenes Peer-reviewed

    Mitsuo Kira, Takeaki Iwamoto, Shintaro Ishida, Hidenori Masuda, Takashi Abe, Chizuko Kabuto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 131 (47) 17135-17144 2009/12

    DOI: 10.1021/ja904525a  

    ISSN: 0002-7863

  98. A ladder polysilane wrapped with amylose Peer-reviewed

    Nobu Kato, Takanobu Sanji, Masato Tanaka, Tetsuya Fukasawa, Shintaro Ishida, Soichiro Kyushin

    JOURNAL OF ORGANOMETALLIC CHEMISTRY 694 (19) 3212-3214 2009/09

    DOI: 10.1016/j.jorganchem.2009.06.001  

    ISSN: 0022-328X

  99. Selective Si-C Bond Cleavage on a Diorganosilicon Porphyrin Complex Bearing Different Axial Ligands Peer-reviewed

    Shintaro Ishida, Kimio Yoshimura, Hideyuki Matsumoto, Soichiro Kyushin

    CHEMISTRY LETTERS 38 (4) 362-363 2009/04

    DOI: 10.1246/cl.2009.362  

    ISSN: 0366-7022

    eISSN: 1348-0715

  100. Isomerization of an Isolable Silylene into a Silene via 1,2-Silyl Migration Peer-reviewed

    Shintaro Ishida, Takeaki Iwamoto, Mitsuo Kira

    ORGANOMETALLICS 28 (3) 919-921 2009/02

    DOI: 10.1021/om800692b  

    ISSN: 0276-7333

  101. Synthetic applications of cycloaddition of silylene Peer-reviewed

    Shintaro Ishida

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN 66 (9) 906-907 2008/09

    DOI: 10.5059/yukigoseikyokaishi.66.906  

    ISSN: 0037-9980

  102. Organosilicon-Based Reactive Intermediates: New Molecular Systems with Silicon-Silicon Multiple Bonds Peer-reviewed

    Mitsuo Kira, Takeaki Iwamoto, Shintaro Ishida

    Organosilicon Chemistry VI: From Molecules to Materials 25-32 2008/05/21

    Publisher: Wiley-VCH Verlag GmbH

    DOI: 10.1002/9783527618224.ch1  

  103. Thermal and photochemical cleavage of Si=Si double bond in tetrasila-1,3-diene Peer-reviewed

    Kei Uchiyama, Selvarajan Nagendran, Shintaro Ishida, Takeaki Iwamoto, Mitsuo Kira

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 129 (35) 10638-+ 2007/09

    DOI: 10.1021/ja0741473  

    ISSN: 0002-7863

  104. A helmeted dialkylsilylene Peer-reviewed

    Mitsuo Kira, Takeaki Iwamoto, Shintaro Ishida

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 80 (2) 258-275 2007/02

    DOI: 10.1246/bcsj.80.258  

    ISSN: 0009-2673

    eISSN: 1348-0634

  105. Reactions of trisilaallene and 2-germadisilaallene with various reagents Peer-reviewed

    Takeaki Iwamoto, Takashi Abe, Shintaro Ishida, Chizuko Kabuto, Mitsuo Kira

    JOURNAL OF ORGANOMETALLIC CHEMISTRY 692 (1-3) 263-270 2007/01

    DOI: 10.1016/j.jorganchem.2006.05.063  

    ISSN: 0022-328X

  106. Synthesis, properties, and reactions of a series of stable dialkyl-substituted silicon-chalcogen doubly bonded compounds Peer-reviewed

    Takeaki Iwamoto, Katsuhiro Sato, Shintaro Ishida, Chizuko Kabuto, Mitsuo Kira

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 128 (51) 16914-16920 2006/12

    DOI: 10.1021/ja065774f  

    ISSN: 0002-7863

  107. Synthesis and structure of a new tetrakis(pentafluorophenyl)borate salt of the silver(I) cation with novel trigonal planar tris(benzene) coordination Peer-reviewed

    K Ogawa, T Kitagawa, S Ishida, K Komatsu

    ORGANOMETALLICS 24 (20) 4842-4844 2005/09

    DOI: 10.1021/om050388c  

    ISSN: 0276-7333

  108. The first isolation of 1,3-diaza-2-sila-4-cyclopentene radical cation salt: The X-ray structure and electronic properties Peer-reviewed

    S Ishida, T Nishinaga, K Komatsu

    CHEMISTRY LETTERS 34 (4) 486-487 2005/04

    DOI: 10.1246/cl.2005.486  

    ISSN: 0366-7022

    eISSN: 1348-0715

  109. Generation and aromaticity of 2-silaimidazolium ion, a new pi-conjugated silylium ion Peer-reviewed

    S Ishida, T Nishinaga, R West, K Komatsu

    CHEMICAL COMMUNICATIONS (6) 778-780 2005

    DOI: 10.1039/b415783d  

    ISSN: 1359-7345

  110. Diverse reactions of nitroxide-radical adducts of silylene, germylene, and stannylene Peer-reviewed

    T Iwamoto, H Masuda, S Ishida, C Kabuto, M Kira

    JOURNAL OF ORGANOMETALLIC CHEMISTRY 689 (8) 1337-1341 2004/04

    DOI: 10.1016/j.jorganchem.2003.12.025  

    ISSN: 0022-328X

  111. Comparative chemistry of isolable divalent compounds of silicon, germanium, and tin Peer-reviewed

    M Kira, S Ishida, T Iwamoto

    CHEMICAL RECORD 4 (4) 243-253 2004

    DOI: 10.1002/tcr.20019  

    ISSN: 1527-8999

  112. The singlet excited state of a stable dialkylsilylene is responsible for its photoreactions Peer-reviewed

    M Kira, S Ishida, T Iwamoto, A de Meijere, M Fujitsuka, O Ito

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 43 (34) 4510-4512 2004

    DOI: 10.1002/anie.200460317  

    ISSN: 1433-7851

  113. New molecular systems with silicon-silicon multiple bonds

    Kira Mitsuo, Iwamoto, Takeaki, Ishida Shintaro

    Chem. Rec. 4 243-253 2004

  114. Addition of stable nitroxide radical to stable divalent compounds of heavier group 14 elements Peer-reviewed

    T Iwamoto, H Masuda, S Ishida, C Kabuto, M Kira

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 125 (31) 9300-9301 2003/08

    DOI: 10.1021/ja0356784  

    ISSN: 0002-7863

  115. Insertion of a stable dialkylsilylene into silicon-chlorine bonds Peer-reviewed

    Shintaro Ishida, Takeaki Iwamoto, Chizuko Kabuto, Mitsuo Kira

    Silicon Chemistry 2 (3-4) 137-140 2003/05

    DOI: 10.1023/B:SILC.0000046709.84243.6b  

    ISSN: 1569-0660 1572-8994

  116. Radical anion of isolable dialkylsilylene Peer-reviewed

    S Ishida, T Iwamoto, M Kira

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 125 (11) 3212-3213 2003/03

    DOI: 10.1021/ja028192g  

    ISSN: 0002-7863

  117. A stable silicon-based allene analogue with a formally sp-hybridized silicon atom Peer-reviewed

    S Ishida, T Iwamoto, C Kabuto, M Kira

    NATURE 421 (6924) 725-727 2003/02

    DOI: 10.1038/nature01380  

    ISSN: 0028-0836

  118. Excited-state reactions of an isolable silylene with aromatic compounds Peer-reviewed

    M Kira, S Ishida, T Iwamoto, C Kabuto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 124 (15) 3830-3831 2002/04

    DOI: 10.1021/ja025522o  

    ISSN: 0002-7863

  119. Unexpected reactions of an isolable dialkylsilylene with haloalkanes Peer-reviewed

    S Ishida, T Iwamoto, C Kabuto, M Kira

    CHEMISTRY LETTERS (11) 1102-1103 2001/11

    DOI: 10.1246/cl.2001.1102  

    ISSN: 0366-7022

    eISSN: 1348-0715

  120. New synthesis of a stable dialkylstannylene and its reversible complexation with tetrahydrofuran Peer-reviewed

    M Kira, S Ishida, T Iwamoto, R Yauchibara, H Sakurai

    JOURNAL OF ORGANOMETALLIC CHEMISTRY 636 (1-2) 144-147 2001/11

    DOI: 10.1016/S0022-328X(01)00998-6  

    ISSN: 0022-328X

  121. The first isolable dialkylsilylene Peer-reviewed

    M Kira, S Ishida, T Iwamoto, C Kabuto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 121 (41) 9722-9723 1999/10

    DOI: 10.1021/ja9925305  

    ISSN: 0002-7863

  122. Synthesis and structure of a stable cyclic dialkylgermylene Peer-reviewed

    M Kira, S Ishida, T Iwamoto, M Ichinohe, C Kabuto, L Ignatovich, H Sakurai

    CHEMISTRY LETTERS (3) 263-264 1999/03

    DOI: 10.1246/cl.1999.263  

    ISSN: 0366-7022

    eISSN: 1348-0715

Show all ︎Show first 5

Misc. 3

  1. ケイ素置換基による光増感色素の活性向上

    堀内 宏明, 眞塩 広之, 穂坂 正博, 石田 真太郎, 久新 荘一郎, 奥津 哲夫, 竹内 利行, 平塚 浩士

    日本レーザー医学会誌 = The Journal of Japan Society for Laser Medicine 32 (2) 224-224 2011/08/31

    ISSN: 0288-6200

  2. The first stable compound with a formally sp-hybridized silicon atom. Synthesis and Unusual Bonding of Stable Trisilaallene

    吉良満夫, 岩本武明, 石田真太郎

    化学と工業 57 (3) 236 2004/02

  3. Stable dialkylsilylene as precursor of the first trisilaallene.

    M Kira, S Ishida, T Iwamoto, C Kabuto

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY 226 U722-U722 2003/09

    ISSN: 0065-7727

Books and Other Publications 1

  1. 現代ケイ素化学

    Shintaro Ishida, Takeaki Iwamoto

    化学同人 2013/04

Presentations 42

  1. Oxidation Chemistry of Silicon-Silicon Multiple Bonded Compounds Invited

    Shintaro Ishida, Shunya Honda, Daichi Yanagisawa, Takeaki Iwamoto

    The 20th International Symposium on Silicon Chemistry 2024/05/14

  2. Dearomative Cycloaddition of N-Heteroaromatic Compounds with a Divalent Silicon Species Invited

    Shintaro Ishida

    International Symposium for the 80th Anniversary of the Tohoku Branch of the Chemical Society of Japan 2023/09/08

  3. Benzodisilacyclobutadiene and related compounds: Formal cyclic 4nπ-electron systems incorporating Si=Si units Invited

    Shintaro Ishida

    The 2021 International Chemical Congress of Pacific Basin Societies (Pacifichem) 2021/12/17

  4. ケイ素多重結合を相互作用ユニットとして用いた分子系の構築 Invited

    石田真太郎

    ケイ素化学協会Web講演会 2021/07/23

  5. Benzodisilacyclobutadienes: Silicon Containing 8π-Electron Systems

    Shintaro Ishida

    The 18th International Symposium on Novel Aromatic Compounds (ISNA-18) 2019/07/25

  6. Incorporating Silicon-Silicon Double Bond into Metallacycles and Polycyclic Conjugated Compounds Invited

    Shintaro Ishida

    Japanese-Spanish Pre-Symposium in Organic Synthesis in Sendai 2018/05/25

  7. Aromatic-fused Silicon-silicon Doubly Bonded Compounds Invited

    Shintaro Ishida

    The 2nd International Symposium on Chemical Communication 2018/05/18

  8. Synthesis and Properties of Benzannelated Disilenes

    Shintaro Ishida

    The 18th International Symposium on Silicon Chemistry (ISOS-18) in conjunction with the 6th Asian Silicon Symposium (ASiS-6) 2017/08/07

  9. Generation and Spectroscopic Observation of Diorganosilanone in Solution Invited

    Shintaro Ishida

    International Symposium of Pure and Applied Chemistry (ISPAC 2017) 2017/06/08

  10. 低配位有機ケイ素および有機リン化合物の安定化 Invited

    石田真太郎

    第15回化学系若手研究者セミナー 2016/10/08

  11. Generation of Diorganosilanone in the Condensed Phase

    Shintaro Ishida

    The 8th European Silicon Days 2016/08/30

  12. 14族および15族元素の安定二配位化合物:分子デザイン、合成、特異な反応性 Invited

    石田真太郎

    第49回有機金属若手の会 夏の学校 2016/07/12

  13. Palladium and platinum complexes of an isolable dialkyldisilyne International-presentation

    Pacifichem2015 2015/12/15

  14. Synthesis, Properties, and Reactions of a Dialkyldisilyne International-presentation

    ASiS-5 2015/10/18

  15. 二配位リン、アンチモン、ビスマス中心ラジカルの長寿命化による15族化学の新展開 Invited

    第32回有機合成化学セミナー 2015/09/15

  16. Double bond species containing silicon atom from silicon versions of carbene and alkyne Invited

    Shintaro Ishida

    平成27年度化学系学協会東北大会 2015/09/12

  17. 安定ベンゾジシラシクロブタジエンの合成、構造、および性質

    第62回有機金属化学討論会 2015/09/07

  18. A stable disilyne having bulky alkyl groups and its palladium and platinum complexes International-presentation

    the 46rh Silicon Symposium 2015/07/21

  19. η2-Dialkyldisilyne Palladium and Platinum Complexes International-presentation Invited

    Shintaro Ishida

    RSC Roadshow Organic Chemistry Symposium 2015/06/01

  20. ケイ素不飽和化学種を活用したπ電子系修飾

    第4回元素化学懇談会 2015/05/16

  21. ベンゾジシラシクロブタジエンの合成と性質

    第41回有機典型元素化学討論会 2014/11/27

  22. Palladium and Platinum Complexes of an Isolable Dialkyldisilyne

    The 16th Korea-Japan Joint Symposium on Organometallic and Coordination Chemistry 2014/10/23

  23. An Isolable Dialkyldisilyne and Its Palladium and Platinum Complexes International-presentation

    The 17th International Symposium on Silicon Chemistry 2014 Berlin 2014/08/03

  24. Palladium and Platinum Complexes of an Isolable Silicon-Silicon Triply Bonded Compound International-presentation

    ICOMC2014 Pre-Symposium in Sendai 2014/07/11

  25. Isolable Dialkylsilylene That Equilibrates with Its Isolable Dimer in Solution International-presentation

    Shintaro Ishida, Takashi Abe, Ryoji Tanaka, Mitsuo Kira, Takeaki Iwamoto

    4th UK/Japan Conference in Catalytic Asymmetric Synthesis 2013/04/19

  26. 単離可能な新規ジアルキルジシリンおよびそのパラジウム錯体の合成と性質

    石田真太郎, 菅原隆太郎, 三澤祥文, 岩本武明

    日本化学会第93春季年会 2013/03/22

  27. 嵩高いアルキル基を有するケイ素多重結合化学種

    第二回元素化学懇談会 2013/03/15

  28. A Siloxy Substituted Cyclopentadiene Showing Aggregation Enhanced Emission: An Application of Cycloaddition of Isolable Dialkylsilylene International-presentation

    Shintaro Ishida, Kenya Uchida, Tsunenobu Onodera, Hidetoshi Oikawa, Mitsuo Kira, Takeaki Iwamoto

    4th Asian Silicon Symposium 2012/10/21

  29. 単離可能なジアルキルジシリンの合成、性質、および反応

    石田真太郎, 菅原隆太郎, 三澤祥文, 岩本武明

    第23回基礎有機化学討論会 2012/09/19

  30. 単離可能なシリレンを用いた不飽和および芳香族ケトンの変換反応

    石田真太郎, 内田健哉, 小野寺恒信, 及川英俊, 吉良満夫, 岩本武明

    第59回有機金属化学討論会 2012/09/13

  31. 嵩高いアルキル基を有するケイ素およびリンの低配位化学種の合成と性質

    平成24年第一回ISCセミナー 2012/07/19

  32. Transformation of Aromatic or Unsaturated Ketones to Silacycles utilizing Isolable Dialkylsilylene International-presentation

    Shintaro Ishida, Kenya Uchida, Tsunenobu Onodera, Hidetoshi Oikawa, Mitsuo Kira, Takeaki Iwamoto

    The 10th International Conference on Heteroatom Chemistry 2012/05/20

  33. 単離可能なシリレンとケトンとの多様な反応

    内田健哉, 岩本武明

    九州大学セミナー 2011/11/26

  34. Synthesis, Properties, and Reactions of a Stable Dialkylphosphinyl Radical

    Shintaro Ishida, Fumiya Hirakawa, Takeaki Iwamoto

    MDFワークショップ 2011/10/07

  35. Synthesis, Structure, and Reactions of a Stable Dialkylphosphinyl Radical

    石田真太郎, 平川達弥, 岩本武明

    第58回有機金属化学討論会 2011/09/07

  36. 単離可能なシリレンとケトンの多様な反応

    岩本武明, 吉良満夫

    第21回基礎有機化学討論会 2010/09/09

  37. ジシラトリプチセンおよびオクタシラキュバンの新展開:剛直有機ケイ素化合物の特異な性質

    京都大学G-COEプログラム有機若手ワークショップ 2009/09/07

  38. シクロテトラシランから誘導される新規アニオン性ケイ素クラスター

    特定領域研究「元素相乗系化合物の化学」第5回公開若手コロキウム 2009/04/16

  39. ヘキサ-tert-ブチルビシクロ[1.1.0]テトラゲルマンの異常な構造と性質

    松本 直純, 松本 英之, 久新 荘一郎

    第55回有機金属化学討論会 2008/09/28

  40. アルコキシシリル基を有するベンズアルデヒドおよびテトラフェニルポルフィリンの合成および有機-シリカハイブリッド材料への応用

    Masayasu ITO, Soshi SHIRAISHI, Soichiro KYUSHIN

    第二回日本化学会関東支部大会 2008/09/18

  41. Synthesis of Novel Anionic Silicon Clusters by the Reduction of Tetra-tert-butyltetrachlorocyclotetrasilane International-presentation

    Naozumi MATSUMOTO, Soichiro KYUSHIN

    The 15th International Symposium on Organosilicon Chemistry 2008/06/01

  42. Structure and Properties of the First Stable Bicyclo[1.1.0]tetragermane International-presentation

    Naozumi MATSUMOTO, Soichiro KYUSHIN

    The 15th International Symposium on Organosilicon Chemistry 2008/06/01

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Industrial Property Rights 2

  1. アルコキシシリル基を有するポルフィリン化合物とその重縮合物及びそれらの製造方法

    石田真太郎, 伊藤真康, 久新荘一郎

    Property Type: Patent

  2. 有機配位子を含む金属カチオン錯体の塩およびその製造方法

    北川敏一, 小川紘平, 石田真太郎, 小松紘一

    Property Type: Patent

Research Projects 12

  1. Direct Phosphinylation of Alkanes Induced by Generation of Super-reactive Phosphorus-centered Intermediates

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Pioneering)

    Institution: Tohoku University

    2022/06/30 - 2026/03/31

  2. Transition Metal Complexes Having Phosphinyl Radicals as Ligands: Functions Based on Orbital Interactions Competitive

    Ishida Shintaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2019/04 - 2023/03

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    We have synthesized transition metal complexes with a phosphinyl radical as a ligand, and we have investigated their functionalities based on the orbital interactions between the radical ligand and the transition metals center. The properties of the pentafluorophenyl-group 11 element (Au, Ag, and Cu) complexes with one phosphinyl radical depend on the central metal, although their spins are mainly localized on the phosphorus atom. In particular, we found that the copper complex with phosphorus radical exhibits solvent-dependent thermochromism, which we attributed to the coordination of the solvent and the dimerization at low temperatures. On the other hand, the corresponding gold complex does not show thermochromism in solution. These results would contribute to the development of the open-shell transition metal complexes and their functionalities.

  3. 可視光を用いた選択的脱芳香族化による交差共役および拡張キノイド型機能性分子の創製

    Offer Organization: 松籟科学技術振興財団

    System: 松籟科学技術振興財団研究助成

    Institution: 東北大学

    2020/04 - 2022/03

  4. Development of the chemistry of silicon-containing antiaromatic compounds by the versatile synthetic method for benzodisilacyclobutadienes Competitive

    Shintaro Ishida

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04 - 2018/03

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    Silicon-containing cyclic 4npi-electron systems were constructed and their characteristics were revealed. We successfully synthesized benzodisilacyclobutadienes, which exhibited a significant contribution of a 1,2-disilacyclobutadiene resonance structure. We also synthesized naphtho- and anthrodisilacyclobutadienes and compared their structure and (anti)aromaticity by various spectroscopies, structural analysis, and theoretical studies. An isolable 1H-phosphadisilirene was obtained as red-purple crystalline solid. In obtained 1H-phosphadisilirene, significant orbital interactions between disilene moiety and phosphorus atoms in the three-membered ring was indicated by UV-vis spectrum and theoretical studies.

  5. Development of heavier group-14 element compounds with reactive bonds that have an unusual geometry

    Iwamoto Takeaki, ISHIDA Shintaro, MOTOMATSU Daiki, AKASAKA Naohiko, YOKOUCHI Yuki, KOBAYASHI Akifumi, KISHIMOTO Yusuke, NUKAZAWA Takumi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2013/05 - 2017/03

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    We succeeded in synthesis of a silicon analog of the smallest zero-bridge bridgehead alklene, bicyclo[1.1.0]but-1(2)-ene which are stabilized by coordination of a base (N,N-dimethylaminopyridine(DMAP)). The reaction of this molecule with a Lewis and theoretical calculations suggest that a zwitterionic structure with a homocyclopropenylium cation and an anion should contribute mainly to its structural characteristics. In addition, mechanisms for formation of a 1.3-disilabicyclo[1.1.0]butane that has an inverted geometry around the bridgehead silicon atoms as well as its reactivity toward some carbonyl compounds were disclosed. We also developed an efficient route to a polycyclic polysiloxane and its facile functionalization at the bridgehead silicon atoms.

  6. Transformation of aromatic compounds utilizing ambiphilicity of silylene Competitive

    Ishida Shintaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (A)

    Institution: Tohoku University

    2013/04 - 2017/03

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    (1) Regioselective photochemical cycloadditions of silylene with azulene and guaiazulene gave bicyclic [4]dendralene and heptafulvene derivatives, respectively. A red-shifted absorption band of thus obtained [4]dendralene was observed, which is attributed to the orbital interactions between dendralene and a silacyclopropane moieties. (2) Thermal dearomative cycloaddition of silylene with pyridines to afford azasilepins was investigated. (3) We found a silanol-catalyzed formal C-H insertion of silylene with pyridine. This reaction proceeds via deprotonation of silanol by base-coordinated silylene. (4) Phosphenium cation and silylene are isolobal. Thus, we planned oxidation of phosphinyl radical to synthesize phosphenium cation for the dearomative cycloaddition. We obtained phosphaalkene-silver complex by the oxidation of phosphinyl radical with silver salts. We succeeded in the generation of dicoordinate antimony- and bismuth-centered radicals as persistent species.

  7. Synthesis and reactions of bifunctional open-shell species of main group elements

    Iwamoto Takeaki, ISHIDA Shintaro, HIRAKAWA Fumiya, IIMURA Tomohiro, KOSAI Tomoyuki, MIURA Yuki, SUZUKI Yuko, ICHIKAWA Hitomi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2012/06 - 2017/03

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    We have successfully synthesized a series of neutral two-coordinate radicals of heavy group-15 elements, which enable us to compare their structures and reactivity. Novel platinum and iron complexes ligated by the phosphine-centered radical were also synthesized and we found that the phosphinyl radical works as a stronger pi acceptor compared to trialkylphosphine and stabilizes the low-coordinate metal radical center. We also developed novel photochemical transformation reactions of azulenes in the presence of a dialkylsilylene. A novel silylene with balancing thermal stability and reactivity was synthesized. Using this new silylene, we disclosed unprecedented intermolecular C-H insertion reactions of a silylene as well as dehydroaromatization reactions.

  8. 嵩高いアルキル基の自在合成を突破口とした超低配位ケイ素化合物の物性解明 研究課題 Competitive

    石田 真太郎

    Offer Organization: 日本学術振興会

    System: 挑戦的萌芽研究

    2013/04 - 2015/03

  9. Radical Addition of Isolable Silyl Radicals for Open-Shell Functional Materials Competitive

    ISHIDA Shintaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2009/04 - 2011/03

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    A persistent tri(silyl)silyl radical, bis(triisopropylsilyl)[phenyl(diisopropyl)silyl]silyl radical was generated by the reduction of the corresponding fluorosilane with sodium. According to EPR spectroscopy, spin delocalized on not only unsaturated silicon but also phenyl group. An isolable diakylphosphinyl radical was successfully synthesized as a yellow crystalline solid and found to be monomeric both in solution and in the solid state. The spin density of the phosphinyl radical is almost localized on the 3p orbital of the dicoordinated phosphorus atom. Distinct electronic transition from nonbonding electron pair orbital to singly occupied 3p orbital on the phosphorus atom of the isolated phosphinyl radical was observed at 445 nm in solution. The reactivity of thus obtained phosphinyl radical has been investigated.

  10. Structural Control and Functionality of Porphyrin-Based Silica Competitive

    ISHIDA Shintaro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (Start-up)

    Institution: Gunma University

    2007/04 - 2009/03

  11. 特異な電子状態を持つケイ素-ホウ素結合化合物の創製と物性

    石田 真太郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 京都大学

    2003 - 2005

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    本年度の研究実績の概要を以下に示す。 1)種々の1,3-ジアザ-2-シラ-4シクロペンテン(DASCP)ラジカルカチオン塩の単離と構造 昨年度はDASCPの電子状態におけるケイ素の効果について検討した。本年度はその研究を発展させ、DASCPの窒素上に種々のアリール基を導入し、π共役系を拡張したDASCPの性質について検討した。 電気化学的測定の結果、これらの化合物はいずれも0V付近という低い電位で酸化され、アリール基上の置換基による電子的効果が小さいことがわかった。銀塩を用いて一電子酸化反応を検討した結果、窒素上の置換基に3,5-di(tert-butyl)phenyl基を持つDASCPラジカルカチオン塩は暗青色結晶として単離することができた。中性状態およびラジカルカチオン状態のDASCPの結晶構造解析から、アリール基がDASCP環に対して大きくねじれていること、5員環窒素の非平面性などが低い置換基効果の理由であると推測された。 2)剛直なσ炭素骨格の縮環した14族メタロールの合成と性質 14族メタロール、特にシロールは固体状態で高い電子受容性と発光性をもつ特異な分子である。今回剛直で嵩高いσ骨格であるビシクロ[2.2.2]オクテン(BCO)骨格が縮環したシロール、ゲルモール、およびスタンノールを合成し、その性質について検討した。 これらの化合物を対応する1,4-ジリチオブタジエンから合成し、無色結晶として単離することができた。理論計算および各種スペクトル測定の結果から、この系では剛直なBCO骨格とメタロール環のσ-π共役によってHOMOが上昇していることがわかった。さらにこのシロールのケイ光は溶液中では弱いが、固体状態ではケイ光量子収率は71-72%と顕著に大きくなることがわかった。アルキル基のみが置換したシロールでこのような特異な性質が観測されたのはこれが初めての例である。

  12. 嵩高い環状二座配位子を用いた新規環状共役および集積14族金属多重結合化合物の創製

    石田 真太郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 特別研究員奨励費

    Institution: 東北大学

    2000 - 2002

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    申請者が合成した初めての単離可能なジアルキルシリレン、1,1,4,4-テトラキス(トリメチルシリル)-1-シラシクロペンタン-1,1-ジイル(1)の反応を検討し以下の知見を得た。 これまでにspケイ素を持つ化合物は知られておらずその性質は未知であった。申請者らは形式的にspケイ素を持つトリシラアレン(2)の合成を行った。シリレン1と四塩化ケイ素の反応で合成した1-クロロ-1-トリクロロシリル-2,2,5,5-テトラキス(トリメチルシリル)-1-シラシクロペンタン(3)をテトラヒドロフラン中低温で4当量のカリウムグラファイトで還元することで初めての安定なトリシラアレン誘導体(2)を収率59%で単離する事に成功した。 トリシラアレン2のエックス線結晶構造解析の結果、2のトリシラアレン骨格の中心ケイ素は4カ所のディスオーダーで観測された。それら4つの位置の占有率はそれぞれの環境が若干異なるために等価でない。しかし温度と結晶を変えて構造解析を行った結果、このディスオーダーは結晶に依存せず、温度に依存して占有率が変わることがわかった。すなわち中心ケイ素のディスオーダーは動的なものであり、結晶中でも中心ケイ素の位置は末端ケイ素を軸にして回転している。この結果はSi=Si=Si集積二重結合がきわめて柔軟であることを示している。 トリシラアレン2のSi=Si=Si骨格は136゜と著しく曲がった構造であった。この構造の結合様式を明らかにするためにモデル化合物の理論計算を行った。その結果2の結合状態はエネルギー準位の異なる、三つのケイ素上に非局在化した2つのパイ軌道で2つのケイ素-ケイ素集積二重結合を形成していることがわかった。

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Teaching Experience 6

  1. 化学一般実験(化学科の学生実験) 東北大学

  2. 大学院有機化学合同講義 東北大学

  3. 有機化学演習 東北大学

  4. 自然科学総合実験(理系学生向け学生実験) 東北大学

  5. 化学C (学部学生向け有機化学) 東北大学

  6. 先端有機化学特論(留学生向け大学院講義) 東北大学

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Social Activities 2

  1. 理科体験教室「群馬おもしろ科学展」

    2008/08/09 - 2008/08/11

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    硼砂とPVA溶液を混ぜて作るスライムを児童に体験させ、 科学への興味を促した。

  2. 現代社会を支えるケイ素の不思議

    2016/12/14 -

Media Coverage 1

  1. 新しい有機ケイ素化合物の設計 -構造と機能の解明-

    桐生タイムス

    2007/02/17

    Type: Newspaper, magazine

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    群馬大学工学部の研究活動紹介の一端として、 研究内容についての一般向け紹介を行った。

Academic Activities 7

  1. 令和5年度化学系学協会東北大会および日本化学会東北支部80周年記念国際会議・化学教育 研究協議会東北大会 実行委員

    2023/09/08 - 2023/09/10

    Activity type: Academic society, research group, etc.

  2. 日本学術振興会 特別研究員等審査会専門委員(書面担当)

    2020 - 2021

    Activity type: Scientific advice/Review

  3. 第35回有機合成化学セミナー実行委員

    2018/09/18 - 2018/09/20

    Activity type: Academic society, research group, etc.

  4. 第43回有機典型元素化学討論会 実行委員

    2016/12/08 - 2016/12/10

    Activity type: Academic society, research group, etc.

  5. 第25回基礎有機化学討論会 実行委員

    2014/09/07 - 2014/09/09

    Activity type: Academic society, research group, etc.

  6. The First Asian Silicon Symposium (ASiS-1) (2007年11月1日~3日)実行委員

    2007/11/01 - 2007/11/03

    Activity type: Academic society, research group, etc.

  7. 南洋工科大(シンガポール)博士審査委員

    2018 -

    Activity type: Scientific advice/Review

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Other 1

  1. ジアザシロール類の合成と機能性

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    ジアザシロール類の合成研究と理論計算による物性予測を行った。理論計算によるとジアザシロールのバンドギャップは代表的な含ケイ素ヘテロ環であるシロールより顕著に小さく、ジアザシロールのオリゴマーは良好な電子・ホール輸送材料として機能すると予測された。種々合成を行ったが、高い電子供与能に由来する不安定性のために現在まで単離には至っていない。