Details of the Researcher

PHOTO

Takashi Komuro
Section
Graduate School of Science
Job title
Senior Assistant Professor
Degree

  • Dr.(Sci.) (Nagoya University)

e-Rad No.
20396419
Researcher ID
GLS-3576-2022

Research History 4

  • 2021/04 - Present
    Tohoku University　Graduate School of Science Department of Chemistry　Lecturer

  • 2007/04 - 2021/03
    Tohoku University　Graduate School of Science, Department of Chemistry

  • 2004/09 - 2007/03
    Tohoku University　Graduate School of Science, Department of Chemistry

  • 2004/04 - 2004/08
    日本学術振興会特別研究員

Education 3

  • Nagoya University　Graduate School of Science

    2001/04 - 2004/03

  • Nagoya University　Graduate School of Science

    1999/04 - 2001/03

  • Nagoya University　Faculty of Science　Department of Chemistry

    1995/04 - 1999/03

Committee Memberships 8

  • 日本化学会東北支部　幹事（令和7年度幹事長）

    2024/03 - Present

  • 錯体化学会第68回討論会・第43回錯体化学国際会議(ICCC2018) 実行委員

    2018/07 - 2018/08

  • 第21回ケイ素化学協会シンポジウム 実行委員

    2017/10 - 2017/10

  • ケイ素化学協会　事務局担当者

    2014/04 - 2016/03

  • 第16回有機金属化学および配位化学に関する日韓合同シンポジウム 実行委員

    2014/10 - 2014/10

  • 第26回有機金属化学国際会議(ICOMC2014)－プレシンポジウム(仙台) 実行委員

    2014/07 - 2014/07

  • 第46回有機金属若手の会夏の学校 世話人幹事（実行委員）

    2013/07 - 2013/07

  • 第25回無機・分析化学コロキウム 事務担当

    2008/05 - 2008/05

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Professional Memberships 4

  • Kinka Chemical Society, Japan

    2022/04 - Present

  • The Society of Silicon Chemistry JAPAN

  • 錯体化学会

  • 日本化学会

Research Interests 2

  • Coordination Chemistry

  • Organometallic Chemistry

Research Areas 1

  • Nanotechnology/Materials / Inorganic and coordination chemistry /

Awards 1

  1. International Congress on Pure & Applied Chemistry (ICPAC) 2018 Lecture Award

    2018/05　Institut Kimia Malaysia & Cambodian Chemical Society

Papers 51

  1. An Fe 2 Al 2 Core in an NHC-Hydroalumylene-Bridged Cluster: Structure and Bonding Invited Peer-reviewed

    Keita Sato, Takashi Komuro, Yuzuki Seki, Chinari Fukushi, Hisako Hashimoto

    Inorganic Chemistry　65　(17)　9305-9311　2026/04/17

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.inorgchem.6c00573 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  2. Flash Communication: Planar W2Ge2 Cluster with NHC–Hydrogermylyne Ligands Invited Peer-reviewed

    Tetsuya Fukuda, Christof Fontanilla, Takashi Komuro, Hiromi Tobita, Hisako Hashimoto

    Organometallics　44　(21)　2512-2515　2025/10/30

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.organomet.5c00361 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  3. Iron Catalysts with Silyl‐NHC Chelate Ligands: Controlling Factors for Hydroboration vs. Dehydrogenative Borylation of Olefins Peer-reviewed

    Nozomu Ishiwata, Takashi Komuro, Kasumi Takahashi, Yasuaki Zenzai, Hiromi Tobita, Hisako Hashimoto

    Chemistry – An Asian Journal　20　(15)　e00709　2025/07/21

    Publisher: Wiley

    DOI： 10.1002/asia.202500709 　

    ISSN： 1861-4728

    eISSN： 1861-471X

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    Abstract Various iron complexes 1, featuring silyl‐NHC chelate ligands (NHC = N‐heterocyclic carbene) were synthesized and investigated for their catalytic performance in the borylation reactions of olefins. Complexes 1 facilitated both hydroboration and dehydrogenative borylation of olefins with HBpin, yielding borylalkanes and borylalkenes, respectively. The selectivity between the two pathways was found to be governed by the steric effect of a substituent on one nitrogen atom of the NHC moiety. Possible catalytic mechanisms including hydroborato and β‐agostic‐alkyl complexes as potential resting states or intermediates are proposed based on stoichiometric reactions.

  4. Seven‐Coordinate Ruthenium Complex with an SiNN‐Pincer Ligand as a Catalyst for Vinyl C─H Deuteration of Olefins Peer-reviewed

    Takashi Komuro, Daiki Mochizuki, Nozomu Ishiwata, Hiromi Tobita, Hisako Hashimoto

    Chemistry – An Asian Journal　20　(16)　e00514　2025/05/26

    Publisher: Wiley

    DOI： 10.1002/asia.202500514 　

    ISSN： 1861-4728

    eISSN： 1861-471X

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    Abstract Seven‐coordinate ruthenium complexes 1a and 1b, featuring silyl–2,2´‐bipyridine SiNN‐pincer ligands with i‐Pr and t‐Bu groups on Si, respectively, were synthesized. Their capped octahedral structures were revealed by single‐crystal X‐ray diffraction study. The stoichiometric reactions of 1a and 1b with styrene in THF afforded η2‐silylalkene chelate complexes. In contrast, performing the same reaction using 1a in C6D6 resulted in the liberation of deuterated styrene (PhDC═CD2), alongside the formation of a deuterated η2‐silylalkene complex. Complex 1a exhibited efficient catalytic activity for the triple deuteration of vinyl hydrogens in mono‐substituted olefins with C6D6 to afford RDC═CD2 (R = Ph, C6H4‐4‐OMe, t‐Bu) with high deuterium incorporation (92%–99%D).

  5. Dinuclear iridium complexes ligated by lithium-ion endohedral fullerene Li+@C60 International-journal Invited Peer-reviewed

    Chinari Fukushi, Takashi Komuro, Hisako Hashimoto

    Chemical Communications　61　(11)　2273-2276　2025/01

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d4cc05485g 　

    ISSN： 1359-7345

    eISSN： 1364-548X

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    Diiridium complexes of Li+@C60 in η2:η2-coordination were synthesised in high yields. Crystal structures including restricted disordering of Li+ and solution properties (UV/Vis, CV and NMR) were investigated.

  6. Transition Metal Parent Alumylene Complexes: Synthesis, Structures, and XPS Characterization of Aluminum Oxidation State Peer-reviewed

    Keita Sato, Takashi Komuro, Susumu Imashuku, Hongyi Li, Tetsu Ichitsubo, Hisako Hashimoto

    Inorganic Chemistry　63　(36)　16940-16948　2024/08/27

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.inorgchem.4c03356 　

    ISSN： 0020-1669

    eISSN： 1520-510X

  7. Iron complexes supported by silyl-NHC chelate ligands: synthesis and use for double hydroboration of nitriles Peer-reviewed

    Takashi Komuro, Kohei Hayasaka, Kasumi Takahashi, Nozomu Ishiwata, Kota Yamauchi, Hiromi Tobita, Hisako Hashimoto

    Dalton Transactions　53　(9)　4041-4047　2024/01

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d3dt03605g 　

    ISSN： 1477-9226

    eISSN： 1477-9234

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    Iron complexes with newly designed silyl-NHC bidentate ligands showed high performance in the catalytic double hydroboration of nitriles to produce N,N-bis(boryl)amines. (selected as a Hot Article)

  8. Recent progress in transition metal complexes supported by multidentate ligands featuring group 13 and 14 elements as coordinating atoms Invited Peer-reviewed

    Takashi Komuro, Yumiko Nakajima, Jun Takaya, Hisako Hashimoto

    Coordination Chemistry Reviews　473　214837-214837　2022/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.ccr.2022.214837 　

    ISSN： 0010-8545

  9. Iridium Complexes with a Naphthyridine-Based Si,N-Ligand: Synthesis and Catalytic Activity toward Olefin Hydrogenation Peer-reviewed

    Keita Sato, Takashi Komuro, Tomohiro Osawa, Hisako Hashimoto, Hiromi Tobita

    Organometallics　41　(18)　2612-2621　2022/09/26

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.organomet.2c00373 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  10. Iridium and rhodium complexes bearing a silyl–bipyridine pincer ligand: synthesis, structures and catalytic activity for C–H borylation of arenes Peer-reviewed

    Takashi Komuro, Daiki Mochizuki, Hisako Hashimoto, Hiromi Tobita

    Dalton Transactions　51　(26)　9983-9987　2022/06

    Publisher: Royal Society of Chemistry (RSC)

    DOI： 10.1039/d2dt01227h 　

    ISSN： 1477-9226

    eISSN： 1477-9234

    More details Close

    Unsaturated 16-electron iridium and rhodium complexes bearing a silyl–bipyridine-based SiNN-pincer ligand (BpySiNN) were synthesised and characterised by X-ray crystallography and NMR spectroscopy. The iridium–BpySiNN complex facilitated the catalytic C(sp2)–H borylation...

  11. Catalysts for Regio- and Stereoselective C(sp3)–H Deuteration of Tricyclohexylphosphine with Benzene-d6 Generated via Dehydrochlorination of Chlorido(dihydrido)iridium Complexes Containing a Xanthene-Based Bis(silyl) Chelate Ligand Peer-reviewed

    Takashi Komuro, Junpei Asagami, Hironori Higashi, Keita Sato, Hisako Hashimoto, Hiromi Tobita

    Organometallics　40　(18)　3113-3123　2021/09/06

    Publisher: American Chemical Society (ACS)

    DOI： 10.1021/acs.organomet.1c00359 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  12. Bifunctional Rhodium Complex Featuring a Silyl–1,8-naphthyridine Si,N-Chelate Ligand: Cooperation of Metal and Pendant Base for Capture and Bond-weakening of BH3 Peer-reviewed

    Keita Sato, Takashi Komuro, Hisako Hashimoto, Hiromi Tobita

    Chemistry Letters　49　(11)　1431-1434　2020/11/05

    Publisher: The Chemical Society of Japan

    DOI： 10.1246/cl.200489 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  13. Synthesis of ruthenium–bis(silyl) chelate complexes without carbonyl ligands by reactions of a bis(allyl)ruthenium(II) complex with bis(hydrosilyl)xanthene and phosphines Peer-reviewed

    Takeo Kitano, Takashi Komuro, Keita Sato, Hiromi Tobita

    Journal of Organometallic Chemistry　919　121316-121316　2020/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.jorganchem.2020.121316 　

    ISSN： 0022-328X

  14. Double and Single Hydroboration of Nitriles Catalyzed by a Ruthenium-Bis(silyl)xanthene Complex: Application to One-Pot Synthesis of Diarylamines and N-Arylimines Peer-reviewed

    Kitano, Takeo, Komuro, Takashi, Tobita, Hiromi

    ORGANOMETALLICS　38　(7)　1417-1420　2019/04

    DOI： 10.1021/acs.organomet.9b00064 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  15. Silyl–pyridine–amine pincer-ligated iridium complexes for catalytic silane deuteration via room temperature C–D bond activation of benzene-d6 Peer-reviewed

    Takashi Komuro, Tomohiro Osawa, Ryuju Suzuki, Daiki Mochizuki, Hironori Higashi, Hiromi Tobita

    Chemical Communications　55　(7)　957-960　2019/01

    DOI： 10.1039/C8CC09178A 　

  16. Synthesis and Unique Catalytic Reactivity of Metal Complexes with Chelate-Type Silyl Ligands Connected by Xanthene Peer-reviewed

    Takashi Komuro, Hiromi Tobita

    76　(12)　1301-1309　2018/12

    DOI： 10.5059/yukigoseikyokaishi.76.1301 　

  17. Diruthenium complexes with a 1,8-Naphthyridine-based Bis(silyl) supporting ligand: Synthesis and structures of complexes containing RuII 2(μ-H)2 and RuI 2 cores Peer-reviewed

    Indra Kusuma, Takashi Komuro, Hiromi Tobita

    Chemistry Letters　47　(4)　400-403　2018

    DOI： 10.1246/cl.171099 　

    ISSN： 1348-0715 0366-7022

  18. Tandem Hydrosilylation/o-C-H Silylation of Arylalkynes Catalyzed by Ruthenium Bis(silyl) Aminophosphine Complexes Peer-reviewed

    Takeo Kitano, Takashi Komuro, Rikima Ono, Hiromi Tobita

    ORGANOMETALLICS　36　(15)　2710-2713　2017/08

    DOI： 10.1021/acs.organomet.7b00528 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  19. Directed ortho-C-H Silylation Coupled with trans-Selective Hydrogenation of Arylalkynes Catalyzed by Ruthenium Complexes of a Xanthene-Based Si,O,Si-Chelate Ligand, "Xantsil" Peer-reviewed

    Takashi Komuro, Takeo Kitano, Nobukazu Yamahira, Keisuke Ohta, Satoshi Okawara, Nathalie Mager, Masaaki Okazaki, Hiromi Tobita

    ORGANOMETALLICS　35　(9)　1209-1217　2016/05

    DOI： 10.1021/acs.organomet.5b01013 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  20. Direct Conversion of a Si-C(aryl) Bond to Si-Heteroatom Bonds in the Reactions of eta(3)-alpha-Silabenzyl Molybdenum and Tungsten Complexes with 2-Substituted Pyridines Peer-reviewed

    Yuto Kanno, Takashi Komuro, Hiromi Tobita

    ORGANOMETALLICS　34　(15)　3699-3705　2015/08

    DOI： 10.1021/acs.organomet.5b00335 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  21. Synthesis of Ruthenium Complexes with a Nonspectator Si,O,P-Chelate Ligand: Interconversion between a Hydrido(eta(2)-silane) Complex and a Silyl Complex Leading to Catalytic Alkene Hydrogenation Peer-reviewed

    Takashi Komuro, Takafumi Arai, Kei Kikuchi, Hiromi Tobita

    ORGANOMETALLICS　34　(7)　1211-1217　2015/04

    DOI： 10.1021/om5011885 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  22. Iridium and Platinum Complexes of Li+@C60 Peer-reviewed

    Takahito Watanabe, Masato F. Itoh, Takashi Komuro, Hiroshi Okada, Takeshi Sakai, Yoshihiro Ono, Kazuhiko Kawachi, Yasuhiko Kasama, Hiromi Tobita

    ORGANOMETALLICS　33　(3)　608-611　2014/02

    DOI： 10.1021/om4008899 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  23. Synthesis of a 14-electron iridium(III) complex with a xanthene-based bis(silyl) chelate ligand (xantsil): A distorted seesaw-shaped four-coordinate geometry and reactions leading to 16-electron complexes Peer-reviewed

    Takashi Komuro, Keisuke Furuyama, Takeo Kitano, Hiromi Tobita

    JOURNAL OF ORGANOMETALLIC CHEMISTRY　751　(SI)　686-694　2014/02

    DOI： 10.1016/j.jorganchem.2013.09.009 　

    ISSN： 0022-328X

    eISSN： 1872-8561

  24. Insertion of carbon monoxide into an aldehyde C=O double bond induced by an (eta(3)-alpha-silabenzyl)carbonylmolybdenum complex Peer-reviewed

    Yuto Kanno, Takashi Komuro, Hiromi Tobita

    RSC ADVANCES　4　(37)　19068-19071　2014

    DOI： 10.1039/c4ra02308k 　

    ISSN： 2046-2069

  25. Synthesis, Structure, and Reactions of a (eta(3)-alpha-silabenzyl)molybdenum Complex: A Synthetic Equivalent of a Coordinatively Unsaturated Silyl Complex Peer-reviewed

    Takashi Komuro, Yuto Kanno, Hiromi Tobita

    ORGANOMETALLICS　32　(9)　2795-2803　2013/05

    DOI： 10.1021/om400225j 　

    ISSN： 0276-7333

    eISSN： 1520-6041

  26. (η3-α-Silabenzyl)tungsten complexes: An isolable intermediate for interconversion between a silylene complex and a silyl complex through 1,2-aryl migration Peer-reviewed

    Eiji Suzuki, Takashi Komuro, Yuto Kanno, Hiromi Tobita

    Organometallics　32　(3)　748-751　2013/02/11

    DOI： 10.1021/om4000105 　

    ISSN： 0276-7333 1520-6041

  27. Silane(silyl) and Bis(silyl)hydrido Manganese Complexes with Different Mn center dot center dot center dot H center dot center dot center dot Si Interaction: Observation of Gradual Si-H Bond Activation on the Metal Center Peer-reviewed

    Takashi Komuro, Satoshi Okawara, Keisuke Furuyama, Hiromi Tobita

    CHEMISTRY LETTERS　41　(8)　774-776　2012/08

    DOI： 10.1246/cl.2012.774 　

    ISSN： 0366-7022

    eISSN： 1348-0715

  28. Preparation of endohedral fullerene containing lithium (Li@C-60) and isolation as pure hexafluorophosphate salt ([Li+@C-60][PF6-]) Peer-reviewed

    Hiroshi Okada, Takashi Komuro, Takeshi Sakai, Yutaka Matsuo, Yoshihiro Ono, Kenji Omote, Kuniyoshi Yokoo, Kazuhiko Kawachi, Yasuhiko Kasama, Shoichi Ono, Rikizo Hatakeyama, Toshiro Kaneko, Hiromi Tobita

    RSC ADVANCES　2　(28)　10624-10631　2012

    DOI： 10.1039/c2ra21244g 　

    ISSN： 2046-2069

  29. Synthesis and characterisation of hydrido molybdenum and tungsten complexes having a hemilabile tridentate Si,Si,O-ligand: observation of stepwise hydrosilylation of a nitrile to form an N-silylimine on the metal centre Invited Peer-reviewed

    Takashi Komuro, Rockshana Begum, Rikima Ono, Hiromi Tobita

    DALTON TRANSACTIONS　40　(10)　2348-2357　2011

    DOI： 10.1039/c0dt01047b 　

    ISSN： 1477-9226

  30. Facile 1,2-Migration of a Methyl Group on a {Dimethoxy(methyl)silyl}tungsten Complex: Formation of a Base-Stabilized (Dimethoxysilylene)(methyl) Complex Invited Peer-reviewed

    Eiji Suzuki, Takashi Komuro, Yuto Kanno, Masaaki Okazaki, Hiromi Tobita

    ORGANOMETALLICS　29　(21)　5296-5300　2010/11

    DOI： 10.1021/om100399s 　

    ISSN： 0276-7333

  31. A layered ionic crystal of polar Li@C-60 superatoms Peer-reviewed

    Shinobu Aoyagi, Eiji Nishibori, Hiroshi Sawa, Kunihisa Sugimoto, Masaki Takata, Yasumitsu Miyata, Ryo Kitaura, Hisanori Shinohara, Hiroshi Okada, Takeshi Sakai, Yoshihiro Ono, Kazuhiko Kawachi, Kuniyoshi Yokoo, Shoichi Ono, Kenji Omote, Yasuhiko Kasama, Shinsuke Ishikawa, Takashi Komuro, Hiromi Tobita

    NATURE CHEMISTRY　2　(8)　678-683　2010/08

    DOI： 10.1038/NCHEM.698 　

    ISSN： 1755-4330

    eISSN： 1755-4349

  32. Synthesis and Characterization of kappa C-2,N-N-Silyliminoacyl Tungsten Complexes Cp*(CO)(2)W{kappa C-2,N-C(R)=NSIR3 '} [R = Me, Et, i-Pr, t-Bu; R-3 ' = (p-Tol)(2)Me, (p-Tol)(3), Et-3; Cp* = eta(5)-C5Me5]: Thermally Induced Carbon-Carbon Bond Cleavage of Their Iminoacyl Ligands Peer-reviewed

    Eiji Suzuki, Takashi Komuro, Yuto Kanno, Masaaki Okazaki, Hiromi Tobita

    ORGANOMETALLICS　29　(7)　1839-1848　2010/04

    DOI： 10.1021/om901123w 　

    ISSN： 0276-7333

  33. Thermal reaction of a ruthenium bis(silyl) complex having a lutidine-based Si,N,Si ligand: formation of a mu-silyl(mu-silylene) diruthenium complex involving a 3c-2e Ru-Si-C interaction Peer-reviewed

    Takashi Komuro, Hiromi Tobita

    CHEMICAL COMMUNICATIONS　46　(7)　1136-1137　2010

    DOI： 10.1039/b915395k 　

    ISSN： 1359-7345

  34. Synthesis and Characterization of DMAP-Stabilized Aryl(silylene) Complexes and (Arylsilyl)(DMAP) Complexes of Tungsten: Mechanistic Study on the Interconversion between These Complexes via 1,2-Aryl Migration Peer-reviewed

    Eiji Suzuki, Takashi Komuro, Masaaki Okazaki, Hiromi Tobita

    ORGANOMETALLICS　28　(6)　1791-1799　2009/03

    DOI： 10.1021/om801140d 　

    ISSN： 0276-7333

  35. SYNTHESIS AND STRUCTURES OF ALKYNYLCHLOROCYCLOTRIPHOSPHAZENES AND THEIR CLUSTER-FORMING REACTIONS WITH OCTACARBONYLDICOBALT Peer-reviewed

    Takashi Komuro, Kenichi Mori, Hiromi Tobita

    HETEROCYCLES　77　(2)　1171-1183　2009/02

    DOI： 10.3987/COM-08-S(F)96 　

    ISSN： 0385-5414

  36. Recombination of an Fe-Si-P Linkage to an Fe-P-Si Linkage through an Isolable Intermediate Phosphasilaferracyclopropane Peer-reviewed

    Masaaki Okazaki, Takahiko Yoshitomi, Junpei Naito, Akira Sato, Takashi Komuro, Hiromi Tobita

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　130　(52)　17674-+　2008/12

    DOI： 10.1021/ja808443v 　

    ISSN： 0002-7863

  37. New hydrosilylation reaction of arylacetylene accompanied by C-H bond activation catalyzed by a xantsil ruthenium complex Invited Peer-reviewed

    Hiromi Tobita, Nobukazu Yamahira, Keisuke Ohta, Takashi Komuro, Masaaki Okazaki

    PURE AND APPLIED CHEMISTRY　80　(5)　1155-1160　2008/05

    DOI： 10.1351/pac200880051155 　

    ISSN： 0033-4545

  38. [Ru(xantsil)(CO)(eta(6)-toluene)]: Synthon for a highly unsaturated ruthenium(II) complex through facile dissociation of the toluene ligand [xantsil = (9,9-dimethylxanthene-4,5-diyl)bis(dimethylsilyl)] Peer-reviewed

    Masaaki Okazaki, Nobukazu Yamahira, Jim Josephus Gabrillo Minglana, Takashi Komuro, Hiroshi Ogino, Hiromi Tobita

    ORGANOMETALLICS　27　(5)　918-926　2008/03

    DOI： 10.1021/om701194e 　

    ISSN： 0276-7333

  39. Iron, ruthenium, and osmium complexes supported by the bis(silyl) chelate ligand (9,9-dimethylxanthene-4,5-diyl)bis(dimethylsilyl): Synthesis, characterization, and reactivity Peer-reviewed

    Jim Josephus G. Minglana, Masaaki Okazaki, Kenji Hasegawa, Lung-Shiang Luh, Nobukazu Yamahira, Takashi Komuro, Hiroshi Ogino, Hiromi Tobita

    ORGANOMETALLICS　26　(24)　5859-5866　2007/11

    DOI： 10.1021/om700720s 　

    ISSN： 0276-7333

  40. Three- and five-membered W/C/N metallacycles formed by incorporation of acetonitrile molecules into silyltungsten intermediates Peer-reviewed

    Eiji Suzuki, Takashi Komuro, Masaaki Okazaki, Hiromi Tobita

    ORGANOMETALLICS　26　(18)　4379-4382　2007/08

    DOI： 10.1021/om700514d 　

    ISSN： 0276-7333

  41. Synthesis, Structure, and Properties of Three- and Six-Membered Metallacycles Composed of Iron, Germanium, and Sulfur Atoms Peer-reviewed

    Masaaki Okazaki, Hiromitsu Kimura, Takashi Komuro, Hiroshi Okada, Hiromi Tobita

    Chemistry Letters　36　(8)　990-991　2007/06/30

    DOI： 10.1246/cl.2007.990 　

  42. The first resonance hybrid of silyl-carbene and pyridyl-silylene complexes: Formation by aryl C-H bond activation of DMAP [4-(dimethylamino)pyridine] on a silylene complex Peer-reviewed

    Rockshana Begum, Takashi Komuro, Hiromi Tobita

    Chemistry Letters　36　(5)　650-651　2007/05/05

    DOI： 10.1246/cl.2007.650 　

    ISSN： 0366-7022

  43. [MoFe3S4](3+) and [MoFe3S4](2+) cubane clusters containing a pentamethylcyclopentadienyl molybdenum moiety Peer-reviewed

    Takashi Komuro, Hiroyuki Kawaguchi, Jianping Lang, Takayuki Nagasawa, Kazuyuki Tatsumi

    JOURNAL OF ORGANOMETALLIC CHEMISTRY　692　(1-3)　1-9　2007/01

    DOI： 10.1016/j.jorganchem.2006.07.047 　

    ISSN： 0022-328X

  44. Group 6 metal complexes with a hemilabile tridentate xantsil ligand and facile insertion of (BuCN)-Bu-t into a W-Si bond [xantsil = (9,9-dimethylxanthene-4,5-diyl)bis(dimethylsilyl)] Peer-reviewed

    R Begum, T Komuro, H Tobita

    CHEMICAL COMMUNICATIONS　(4)　432-433　2006/01

    DOI： 10.1039/b512759a 　

    ISSN： 1359-7345

  45. Synthesis of a vanadium(III) tris(arylthiolato) complex and its reactions with azide and azo compounds: Formation of a sulfenamide complex via cleavage of an azo N=N bond Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    INORGANIC CHEMISTRY　44　(2)　175-177　2005/01

    DOI： 10.1021/ic048721c 　

    ISSN： 0020-1669

  46. Synthesis and structural characterization of silanethiolato complexes having tert-butyldimethylsilyl and trimethylsilyl groups Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    DALTON TRANSACTIONS　(10)　1618-1625　2004

    DOI： 10.1039/b316567a 　

    ISSN： 1477-9226

  47. Coordination chemistry of silanedithiolato ligands derived from cyclotrisilathiane: Synthesis and structures of complexes of iron(II), cobalt(II), palladium(II), copper(I), and silver(I) Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    INORGANIC CHEMISTRY　42　(17)　5340-5347　2003/08

    DOI： 10.1021/ic0343253 　

    ISSN： 0020-1669

  48. Unusual coordination modes of arylthiolates in Mo{eta(5)-SC6H3-2,6-(SiMe3)(2)} {eta(7)-SC6H3-2,6-(SiMe3)(2)} Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY　125　(8)　2070-2071　2003/02

    DOI： 10.1021/ja029541+ 　

    ISSN： 0002-7863

  49. Copper and silver complexes containing the S(SiMe2S)(2)(2-) ligand: Efficient entries into heterometallic sulfido clusters Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION　42　(4)　465-+　2003

    DOI： 10.1002/anie.200390141 　

    ISSN： 1433-7851

  50. Synthesis and reactions of triphenylsilanethiolato complexes of manganese(II), iron(II), cobalt(II), and nickel(II) Peer-reviewed

    T Komuro, H Kawaguchi, K Tatsumi

    INORGANIC CHEMISTRY　41　(20)　5083-5090　2002/10

    DOI： 10.1021/ic025715c 　

    ISSN： 0020-1669

  51. Palladium dimethylsilanedithiolato complex: a precursor for Ti-Pd and Ti-Pd-2 heterometallic complexes Peer-reviewed

    T Komuro, T Matsuo, H Kawaguchi, K Tatsumi

    CHEMICAL COMMUNICATIONS　(9)　988-989　2002

    DOI： 10.1039/b201702d 　

    ISSN： 1359-7345

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Misc. 10

  1. リン鉱石からリン化合物への新しい道筋 Invited

    小室 貴士

    月刊化学　73　(10)　64-65　2018/09

  2. Recent Development of Metal-Complex Catalysts Bearing Silyl Chelate Ligands for Transformation of C-H Bonds and Small Molecules Invited

    Takashi Komuro

    Bulletin of Japan Society of Coordination Chemistry　70　36‐39　2017/11

    ISSN： 1882-6954

  3. メタンのC–Hホウ素化 Invited Peer-reviewed

    小室貴士

    Organometallic News　(2)　73-73　2016/05

    Publisher: 一般社団法人近畿化学協会 有機金属部会

  4. リチウム内包[60]フラーレンが配位した遷移金属錯体の合成と構造

    渡邉孝仁, 伊藤正人, 小室貴士, 岡田洋史, 酒井健, 小野吉弘, 笠間泰彦, 飛田博実

    錯体化学討論会講演要旨集　60th　81　2010/09/16

  5. リチウムプラズマを用いた新規C60フラーレンの合成と構造

    岡田洋史, 酒井健, 河地和彦, 表研次, 笠間泰彦, 横尾邦義, 小野昭一, 安東真理子, 前川英己, 秋山公男, 小室貴士, 飛田博実

    分子科学討論会講演要旨集(CD-ROM)　1st　4P001　2007/08/24

  6. Synthesis of Silylene Complexes via 1,2-Migration of an Alkyl Group from a Silyl Ligand

    鈴木鋭二, 小室貴士, 岡崎雅明, 飛田博実

    日本化学会講演予稿集　86th　(1)　2006

    ISSN： 0285-7626

  7. アリール基の1,2-転位を利用したシリルおよびシリレンタングステン錯体の合成およびその性質

    鈴木鋭二, 小室貴士, 岡崎雅明, 飛田博実

    錯体化学討論会講演要旨集　56th　2006

  8. タングステン-ケイ素結合へのニトリルの挿入および環化付加反応による錯体の合成とその性質

    鈴木鋭二, 小室貴士, 岡崎雅明, 飛田博実

    錯体化学討論会講演要旨集　55th　2005

  9. Synthesis, Structures and Reactivity of Thiogermyliron Complexes

    木村博充, 岡崎雅明, 小室貴士, 飛田博実

    日本化学会講演予稿集　85th　(1)　2005

    ISSN： 0285-7626

  10. シリルホスフィド配位子を有する鉄(II)錯体の構造および反応性

    吉富隆彦, 小室貴士, 柿沢多恵子, 岡崎雅明, 飛田博実

    錯体化学討論会講演要旨集　55th　2005

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Presentations 49

  1. Synthesis and Properties of an Iron Complex with a Silyl-NHC-Pyridine Pincer Ligand

    Takashi Komuro, Kota Yamauchi, Hisako Hashimoto

    2024/09/14

  2. Designing Multidentate Silyl Ligands for Metal Catalysts toward Functionalization of Strong Bonds Invited

    Takashi Komuro

    2022/09/26

  3. Iridium Complexes Featuring Hemilabile Tridentate SiOSi Ligands: Synthesis and Catalytic Activity for C(sp3)–H Deuteration

    Takashi Komuro, Junpei Asagami, Hironori Higashi, Keisuke Furuyama, Keita Sato, Hiromi Tobita, Hisako Hashimoto

    2022/09/07

  4. Synthesis and Properties of a Ruthenium Complex Coordinated by Lithium-Ion Endhedral Fullerene

    Takashi Komuro, Naoki Takagishi, Takeo Kitano, Hisako Hashimoto, Hiromi Tobita

    2022/03/26

  5. シリルキレート錯体の配位子設計に基づく特異な触媒機能の開発 Invited

    小室 貴士

    錯体化学若手の会 第5回ウェブ勉強会　2020/10/12

  6. Metal Complexes with a Bis(silyl)xanthene Supporting Ligand: Catalysis for Hydroboration of Nitriles and C–H Deuteration of Trialkylphosphine International-presentation Invited

    Takashi Komuro, Takeo Kitano, Hironori Higashi, Junpei Asagami, Hiromi Tobita

    International Congress on Pure & Applied Chemistry Langkawi (ICPAC Langkawi) 2018　2018/11/02

  7. Silyl–Pyridine–Amine/Pyridine Pincer Ligated Iridium Complexes as Catalysts for C–H/C–D Bond Activation International-presentation

    Takashi Komuro, Daiki Mochizuki, Tomohiro Osawa, Hiromi Tobita

    43rd International Conference on Coordination Chemistry (ICCC2018)　2018/07/31

  8. Transition-Metal Complexes with Silyl(2,2’-Bipyridine) Pincer Ligands: Synthesis and Catalysis for Functionalization of C–H/C–D Bonds International-presentation Invited

    Takashi Komuro, Daiki Mochizuki, Hiromi Tobita

    International Congress on Pure & Applied Chemistry (ICPAC) 2018　2018/03/07

  9. Iridium complexes having a bis(silyl) chelate ligand: synthesis and catalysis for C-H deuteration

    Takashi Komuro, Junpei Asagami, Hiromi Tobita

    2017/09/16

  10. ortho-C-H Silylation/Hydrosilylation of Diarylalkynes Catalyzed by Ruthenium Complexes Bearing a Bis(silyl) Chelate Ligand International-presentation

    Takashi Komuro, Takeo Kitano, Hiromi Tobita

    The 18th International Symposium on Silicon Chemistry (ISOS-18)　2017/08/06

  11. シリルキレート配位子で活性化された金属触媒の創製と不活性結合変換反応の開発

    Takashi Komuro

    第20回ケイ素化学協会シンポジウム　2016/10/07

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    依頼講演（トピックス講演）

  12. Ruthenium Catalysts Supported by a Xanthene-Based Bis(silyl) Chelate Ligand for C-H Silylation of Diarylalkynes International-presentation Invited

    Takashi Komuro, Takeo Kitano, Hiromi Tobita

    International Symposium on Pure & Applied Chemistry (ISPAC) 2016　2016/08/15

  13. シリルキレート配位子の金属活性化能を利用した錯体触媒の創製と反応開発

    Takashi Komuro

    2016/06/03

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    依頼講演

  14. Iridium catalyst featuring a hemilabile SiNN-pincer ligand for Si–H deuteration of hydrosilanes with benzene-d6 International-presentation

    The International Chemical Congress of Pacific Basin Societies 2015 (Pacifichem 2015)　2015/12/15

  15. HemilabileなSiNNピンサー型配位子を有する９族金属錯体の合成と触媒機能

    2015/10/23

  16. ケイ素およびリンを配位原子とするキサンテン誘導体がキレート配位した遷移金属錯体の合成，構造および反応

    小室 貴士, 新井 崇史, 菊地 彗, 飛田 博実

    2014/10/17

  17. Ruthenium Complexes Bearing a Non-Spectator Si,O,P-Chelate Ligand: Interconversion between a Hydrido(η2-silane) Complex and a Silyl Complex International-presentation

    Takashi Komuro, Takafumi Arai, Kei Kikuchi, Hiromi Tobita

    XXVI International Conference on Organometallic Chemistry (ICOMC2014)　2014/07/13

  18. A 14-Electron Four-Coordinate Iridium Complex Bearing a Xanthene-Based Bis(silyl) Chelate Ligand: Synthesis, Structure, and Reactions International-presentation

    Takashi Komuro, Keisuke Furuyama, Takeo Kitano, Hiromi Tobita

    The 1st International Symposium for Young Chemists on Stimuli-Responsive Chemical Species for the Creation of Functional Molecules　2013/12/02

  19. An {η3-α-Silabenzyl}molybdenum Complex: a Synthetic Equivalent of Both Silyl and Silylene Complexes Due to the Lability of Its Mo-C and Si-C Bonds International-presentation

    Takashi Komuro, Yuto Kanno, Hiromi Tobita

    XXV International Conference on Organometallic Chemistry (ICOMC2012)　2012/09/02

  20. キサンテン骨格で連結されたビス(シリル)配位子を持つ遷移金属錯体の合成と反応

    Takashi Komuro

    第45回有機金属若手の会夏の学校　2012/07/09

    More details Close

    依頼講演

  21. Stepwise Si–H Bond Activation on a Metal Center: Isolation and Structure Determination of Three Manganese Complexes Having Different Mn···H···Si Interaction

    Takashi Komuro, Satoshi Okawara, Hiromi Tobita

    第58回有機金属化学討論会　2011/09/07

  22. Synthesis and reactivity of (η3-α-silabenzyl)tungsten complexes International-presentation

    Takashi Komuro, Eiji Suzuki, Yuto Kanno, Hiromi Tobita

    The 2010 International Chemical Congress of Pacific Basin Societies (PACIFICHEM 2010)　2010/12/15

  23. （η3-α-シラベンジル）タングステン錯体の合成と反応

    第13回ケイ素化学協会シンポジウム　2009/10/30

  24. Synthesis and Reactions of (η3-α-Silabenzyl)tungsten Complexes International-presentation

    The 4th International Symposium for Young Elements Chemists 2009 Workshop on Organometallic Chemistry　2009/10/28

  25. 金属－ケイ素－リン三員環錯体の合成および反応性制御

    第26回無機・分析化学コロキウム　2009/06/05

    More details Close

    依頼講演

  26. オリゴフェニレンユニットで連結された（イミノアシル）タングステン二核錯体の合成と性質

    日本化学会第８９春季年会　2009/03/27

  27. Generation of 16-Electron Tungsten-Silyl Complexes and Their Reactivity Toward Organic Molecules International-presentation

    Takashi Komuro, Eiji Suzuki, Rockshana Begum, Hiromi Tobita

    Global COE and IREMC Symposium on Functional Materials and Analytical Approaches for Molecular Complex Chemistry　2008/11/05

  28. Synthesis and Reactivity of Group 6 Metal Complexes Having a Hemilabile Bis(silyl) Chelate Ligand International-presentation

    XXIII International Conference on Organometallic Chemistry (ICOMC2008)　2008/07/13

  29. Synthesis and Reactivity of Group 6 Metal Complexes Having a Hemilabile Bis(silyl) Chelate Ligand International-presentation

    The First Asian Silicon Symposium　2007/11/01

  30. タングステン，ケイ素およびリンからなる三員環錯体の合成と性質

    平成１９年度化学系学協会東北大会　2007/09/21

  31. キサンテン骨格に２つのシリル基を導入した多座配位子を持つ遷移金属錯体の化学

    ヤングブレインズによる先端科学シンポジウム　2007/02/17

  32. SiNSi型三座配位子を有するビス（シリル）ルテニウム錯体の合成と反応

    第56回錯体化学討論会　2006/09/16

  33. Hemilabile Bis(silyl) Complexes of Ruthenium, Molybdenum, and Tungsten International-presentation

    Takashi Komuro, Nobukazu Yamahira, Rockshana Begum, Masaaki Okazaki, Hiromi Tobita

    The International Symposium on Dynamic Complexes IDSC 2005　2005/10/25

  34. シリルホスフィド配位子を有する鉄(II)錯体の構造および反応性

    第55回錯体化学討論会　2005/09/21

  35. ケイ素を含んだチオラート配位子を有する遷移金属錯体の合成と性質

    Takashi Komuro

    第22回無機・分析化学コロキウム　2005/07/01

    More details Close

    依頼講演

  36. バナジウム(III)トリス（アリールチオラート）錯体の合成と反応

    第54回錯体化学討論会　2004/09/23

  37. Synthesis of a molybdenum(II) bis(arylthiolate) complex having unusual coordination modes of arylthiolates International-presentation

    XXXVIth International Conference on Coordination Chemistry　2004/07/18

  38. 2 座アリールチオラート配位子を有するチタン（IV），バナジウム（IV），およびジルコニウム（IV）錯体の合成と構造

    日本化学会第84春季年会　2004/03/26

  39. サンドイッチ型モリブデン(II)ビス（アリールチオラート）錯体の反応性

    第53回錯体化学討論会　2003/09/24

  40. 2,6-ビス（トリメチルシリル）アリールチオラート配位子を有するチタン(IV)、バナジウム(III)、および鉄(II)錯体の合成と構造

    第53回錯体化学討論会　2003/09/24

  41. モリブデン（II）ビス（アリールチオラート）錯体の合成と反応

    日本化学会第83春季年会　2003/03/18

  42. 銅シランジチオラート錯体のケイ素硫黄結合切断による異核金属硫黄クラスターの合成

    第52回錯体化学討論会　2002/09/30

  43. Synthesis and Reactions of a Palladium Dimethylsilanedithiolato Complex International-presentation

    XXXVth International Conference on Coordination Chemistry　2002/07/21

  44. ジメチルシランジチオラート配位子を持つパラジウム錯体の合成と反応

    日本化学会第81春季年会　2002/03/26

  45. トリアルキルシリル置換チオラート配位子を有するチタン、鉄およびニッケル錯体の合成と構造

    第51回錯体化学討論会　2001/09/28

  46. シリルチオラート配位子を持つ鉄錯体の合成およびケイ素―硫黄結合切断反応

    日本化学会第79春季年会　2001/03/28

  47. 第１周期遷移金属シリルチオラート錯体の合成と構造

    日本化学会第79春季年会　2001/03/28

  48. スルフィド架橋鉄２核カルボニル錯体を構築単位とした新規モリブデン－鉄－硫黄クラスターの合成

    第50回錯体化学討論会　2000/09/16

  49. 環状骨格をもつMo4Fe4S12 クラスターの合成と構造

    2000/03/28

Show all Show first 5

Industrial Property Rights 4

  1. 原子内包フラーレン誘導体および原子内包フラーレン誘導体の製造方法ならびに原子内包フラーレンの内包原子のケージ内位置確定方法

    渡邉孝仁, 飛田博実, 小室貴士, 伊藤正人, 笠間泰彦, 表研次

    Property Type: Patent

  2. 単離した内包フラーレン及び塩

    岡田洋史, 酒井建, 小野吉弘, 笠間泰彦, 表研次, 小室貴士, 飛田博実, 石川 真介

    Property Type: Patent

  3. 電解質を添加した移動相を用いた原子内包フラーレン塩の分離・精製方法

    岡田洋史, 酒井建, 小野吉弘, 笠間泰彦, 表研次, 小室貴士, 飛田博実

    特許第5539686号

    Property Type: Patent

    Holder:

  4. アルカリ金属を内包するフラーレンベース材料誘導体

    笠間泰彦, 表研次, 岡田洋史, 飛田博実, 小室貴士, 石川真介

    特許第5268298号

    Property Type: Patent

    Holder:

Research Projects 13

  1. Development of highly-functionalized complex catalysts of earth-abundant transition metals with silicon-based chelate ligands and their application to reactions via cleavage of strong bonds

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

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

    Institution: Tohoku University

    2025/04/01 - 2028/03/31

  2. Development of highly reactive complexes of 3d transition metals by use of silicon-based multidentate ligands and exploration of catalytic functions of these complexes

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

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

    Institution: Tohoku University

    2022/04/01 - 2025/03/31

  3. Development of Catalysts Bearing Metal Centers Activated by Silicon-Based Supporting Ligands and Their Use for Transformation of C-H Bonds

    Komuro Takashi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

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

    Institution: Tohoku University

    2019/04/01 - 2022/03/31

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    In this study, we developed metal complex catalysts bearing silicon-based ligands (silyl ligands), which were expected to enhance the reactivity of the metal centers. Specifically, to improve the activity of such complexes toward cleavage of chemical bonds, we designed and synthesized metal complexes supported by new silyl multidentate ligands possessing “high electron donating property” or “function to hold two metal centers”, and we also investigated their catalytic activity. Moreover, we succeeded in developing an iron catalyst for hydroboration of a C≡N triple bond of nitrile and an iridium catalyst for deuteration via cleavage of robust alkyl C-H bonds of a phosphorus compound.

  4. シリル配位子部分を含むキレート錯体を触媒とした不活性結合変換反応の開発 Competitive

    小室 貴士

    Offer Organization: 日本学術振興会

    System: 基盤研究(C)

    2016/04 - 2019/03

    More details Close

    遷移金属錯体を触媒とした不活性結合(C-H結合など)の変換反応は，有機合成前駆体や材料として有用な化成品合成への利用価値が高いため，その開発研究が活発になされている。本研究では，研究代表者らのこれまでの研究実績に基づき，不活性結合変換能を持つ触媒として，シリル配位子部分を含む独自のピンサー配位子(シリルピンサー配位子)を有する錯体を対象とする。同錯体ではシリル配位子の効果(σ-供与性とトランス影響が共に大きい)により，金属中心の不活性結合に対する反応性が向上していると期待される。 期間内に，SiNNおよびSiCN型ピンサー配位子の開発と遷移金属(Ir, Rh, Ruなど)の錯体への誘導を行うとともに，同錯体を触媒としたC-HやC-D結合の変換反応(H/D交換，シリル化，ボリル化など)を検討し，新奇な反応や温和な条件下進行する高効率な反応の開発を目指す。

  5. 置換活性部位を持つキレート配位子を導入した反応性金属－ケイ素錯体の開発と触媒機能 Competitive

    小室 貴士

    Offer Organization: 日本学術振興会

    System: 基盤研究(C)

    2013/04 - 2016/03

    More details Close

    金属－ケイ素結合を持つ遷移金属錯体は，有用化成品である有機ケイ素化合物を合成する触媒反応の鍵中間体であり，その反応性に関する研究は当該触媒反応の機構解明に有効であるだけでなく，金属－ケイ素錯体自身が当該反応に対して触媒活性を示す可能性がある。 本研究では，反応活性な金属－ケイ素錯体として，キサンテン骨格を含むビス(シリル)配位子(xantsil“キサントシル”)を持つ遷移金属錯体を対象とする。xantsil配位子は二つのケイ素と酸素(キサンテン骨格)で金属への三座配位が可能であり，その酸素配位子部分が置換活性であるため，当該錯体は配位不飽和な錯体の合成等価体として働く。期間内に，有機ケイ素化合物合成における錯体触媒に広く用いられている９および１０族遷移元素を中心金属としたxantsil錯体を新たに合成し，その反応性および触媒活性を明らかにする。

  6. Elucidation of reactivity of new metal/silicon complexes having two types of labile bond and their application as catalysts Competitive

    KOMURO Takashi

    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

    2011/04 - 2013/03

    More details Close

    Reactivity and catalytic activity of η^3-α-silabenzyl complexes (molybdenum complex1 and tungsten complex 2) bearing a unique η^3-coordination of silicon and two aromatic carbons to the metal center were studied, and we obtained the following results. (1) Reactions of complexes 1,2 with organic molecules (alcohol, ketones, aldehydes, andalkenes) were examined, and we found that the reactions proceed through cleavage of metal-carbon bonds or a silicon-carbon bond of these complexes. (2) We also revealed that complex 1 shows catalytic activity for hydrosilylation of unsaturated organic molecules.

  7. Reaction Search and Function Development for the Unsaturated Bonding Systems between Transition Metals and Heavier Group 14 Elements

    TOBITA Hiromi, HASHIMOTO Hisako, KOMURO Takashi, WATANABE Takahito

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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

    Institution: Tohoku University

    2010 - 2012

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    We found that, with regard to the complexes having a double or triple bond between tungsten or ruthenium and silicon or germanium, reduction of the steric hindrance of substituents caused the dramatic enhancement of reactivity of the metal-Group 14 element unsaturated bond, and their reactions with various organic molecules proceeded smoothly. Especially, we clarified the reactivity of the tungsten-germanium triple bond toward organic molecules for the first time. We also demonstrated that η^3-α-silabenzyl tungsten and molybdenum complexes serve as the synthetic equivalents of both silylene complexes and coordinatively unsaturated complexes.

  8. ケイ素を含む多座配位子を持つ金属錯体触媒の開発 Competitive

    小室 貴士

    Offer Organization: 財団法人 日揮・実吉奨学会

    System: 平成２１年度日揮・実吉奨学会研究助成

    2009/09 - 2010/08

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    遷移金属錯体は，均一系触媒として働き，医薬品や香料などの有機化合物の合成に広く利用されている。そのため，新しい触媒の開発を目指し，金属錯体の合成および反応性に関する活発な基礎研究が行われている。 当研究室では，ケイ素で金属に配位するシリル配位子(-SiR3)を持つ金属シリル錯体の合成およびその触媒活性について研究を行っている。これまでに，キレート型の多座シリル配位子（キサントシル配位子）を独自に開発し，その錯体の反応性について明らかにした。その結果，キサントシル配位子を持つ１６電子ルテニウム（ホスフィン）錯体1を触媒としたフェニル基置換アルキンと第三級シランとの反応により，芳香環上にシリル基が導入された(E)-アルケンが選択的に得られることを明らかにした。本反応は，錯体1に特異な新しいヒドロシリル化反応である。 本研究では，ルテニウム（キサントシル）錯体1の触媒反応に関するこれまでの研究を発展させることを目的とし，前述のヒドロシリル化反応を触媒する，より高活性な新しいキサントシル錯体を開発する。

  9. Development of Catalytic Reactions Promoted by Ruthenium Complexes Having a Multidentate Silyl Ligand Competitive

    KOMURO Takashi

    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

    2008/04 - 2010/03

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    As a development of a new hydrosilylation reaction catalyzed by a 16-electron bis(silyl)ruthenium complex A, in which phenyl-substituted alkyne reacts with tertiary silane to give (E)-alkene having a silylated aromatic group, we got the following results (1)-(3). (1)This reaction for various combinations of alkynes and silanes was investigated to elucidate the substituent effect of the substrates on the hydrosilylation. (2)Complex A was found to become a catalyst for hydroboration of an alkyne C≡C triple bond. (3)Related complexes having an N-heterocyclic carbene ligand instead of the phosphine ligand in A were synthesized. Comparison of their catalytic activity on the hydrosilylation revealed how the difference of the ligand influenced on the reactivity.

  10. ケイ素多座配位子を持つルテニウム錯体による新規な触媒反応の開発 Competitive

    小室 貴士

    Offer Organization: 東北大学大学院理学研究科

    System: 理学研究科若手研究者奨励研究基金

    2007/04 - 2008/03

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    申請者らは，ケイ素多座配位子を持つルテニウム錯体1を触媒としたフェニル基置換アセチレンと３級シランとの特異な反応（オルトシリル化反応）についての研究を発展させるとともに，錯体1を用いた新しい触媒反応の開発を目指して以下の研究を行った。 ① 錯体1を触媒としたオルトシリル化反応について，複数種類の置換基を持つ３級シランとフェニル基置換アセチレンの組み合わせに対して系統的な反応研究を行ない，当該反応の一般性について調査するとともにその置換基効果を明らかにした。今後，反応の一般性をより確実にし，その機構を解明するために，さらに広範な種類の基質に対して触媒反応を検討する予定である。 ② オルトシリル化反応生成物であるアルケン(E)-PhC(H)=C(H)(o-PhMe2SiC6H4)の単結晶を作成し，そのX線結晶構造解析に成功した。

  11. 金属触媒を担持したポリホスファゼン複合材料のモデルとなる錯体の合成およびその性質の解明 Competitive

    小室 貴士

    Offer Organization: 財団法人 国際科学技術財団

    System: 国際科学技術財団 平成１８年度研究助成

    2006/04 - 2007/03

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    リンと窒素が交互に結合した無機高分子であるポリホスファゼンに，触媒活性を有する遷移金属錯体を担持することで，高分子触媒として機能する複合材料を構築できる可能性がある。本研究では，六員環のシクロトリホスファゼン骨格に遷移金属を担持した化学種を前述のポリホスファゼン化合物のモデルとして捉え，その合成，構造解析および性質を解明し，ポリホスファゼン複合材料の開発につながる有用な基礎的知見を得る。

  12. Construction of Novel Silicon-Transition Metal Multiple Bonds, Elucidation of the Mechanisms for Their Reactions, and Their Expansion to Catalytic Reactions

    TOBITA Hiromi, HASHIMOTO Hisako, KOMURO Takashi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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

    Institution: Tohoku University

    2006 - 2007

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    By a newly developed method, we succeeded in synthesizing the first hydrido (hydrosilylene) ruthenium complex. This complex reacted readily with aldehydes, nitriles, and alkyne to give agostic complexes selectively as primary products. These products are presumed to form through [2+2] cycloaddition between the Ru=Si bond and unsaturated bonds of the substrates followed by partial reductive elimination of the Si-H bond. The complex also reacted smoothly with enones, isocyanates, isothiocyanates, etc. to afford complexes with intriguing structures through [4+2] cycloaddition, hydride migration, C=S bond cleavage, etc. We also succeeded in the synthesis of base-free silyl (silylene) ruthenium complex, and revealed its structure and dynamic behavior. This complex is more reactive than the iron analogue, and addition of a strong Lewis base DMAP resulted in formation of a base-stabilized silyl (silylene) complex was converted to an unprecedented η^<4->sila-o-quinodimethane complex. Moreover, the reaction of the silyl (silylene) complex with alcohol surprisingly induced the substitution of all methyl groups on the silyl ligand with alkoxy groups to produce a trialkoxysilyl complex. We demonstrated that the tungsten complexes with an aryl ligand and a silylene ligand underwent 1, 2-aryl migration from the tungsten center to the silylene ligand through formation of η^<3->-silabenzyl complexes as intermediates. The coordinatively unsaturated silyl complexes generated by this migration reacted with nitriles to yield K^<2-> iminoacyl complexes through insertion of a nitrile molecule into the tungsten-silicon bond. The K^<2-> iminoacyl complexes further reacted with another molecule of nitrile to give five-membered metallacycles through ring expansion. By the reaction of a bis (phosphine) platinum complex with sterically congested tribromosilane in the presence of a reducing agent, we succeeded in synthesizing the first (bromosilylene) platinum complex. X-ray crystal structure analysis revealed that this complex has a very short platinum-silicon bond and a completely planar tricoordinate silicon. These facts clearly demonstrate the double bond character of the platinum-silicon boon. We also succeeded in derivation of this complex to a base-stabilized cationic silylyne complex.

  13. 窒素分子の活性化を目指した遷移金属アリールチオラート錯体の化学 Competitive

    小室 貴士

    Offer Organization: 文部科学省

    System: 特別研究員奨励費

    2004/04 - 2004/08

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    前周期遷移金属アリールチオラート錯体の系統的な合成を行い，さらに，得られた錯体に特異的な反応性を見出した。 (i) アリールチオールがジメチルシリル基で架橋した２座配位子{2-(S)-3-Ph-C6H3}2SiMe2を用いて、前周期遷移金属（チタン、ジルコニウムおよびバナジウム）錯体の合成を行った。 (ii) かさ高い2,6-ビス（トリメチルシリル）アリールチオラート配位子(SC6H3-2,6-(SiMe3)2:SAr)を有する，低配位のバナジウム(III)トリス（アリールチオラート）錯体V(SAr)3(thf) (1)を合成し，含窒素基質との反応性を明らかにした。錯体1はアゾベンゼン(PhN=NPh)の窒素間２重結合を還元的に切断し，バナジウム(V)イミド-スルフェナミド錯体V(NPh){N(Ph)SC6H3-2-CH2SiMe2-6-SiMe3}(SAr)を生成した。一方，1と1-アジドアダマンタン(AdN3)との反応では，窒素分子の発生を伴い，イミド錯体V(SAr)3(NAd)が高収率で得られた。 本研究で得られた成果は，前周期チオラート錯体の構造および反応性に関して新たな知見を与え，研究目的である，チオラート錯体による窒素分子の活性化を目指した研究の進展に貢献するものと期待される。

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Teaching Experience 9

  1. Topics in Inorganic and Analytical Chemistry IB　Graduate School of Science, Tohoku University

  2. Inorganic Chemistry IA　Tohoku University

  3. Advanced Inorganic Chemistry IV / Advanced Chemistry and Biochemistry IB　Tohoku University, Graduate School of Science

  4. 学問論演習　東北大学 Undergraduate (liberal arts)

  5. 無機・分析化学特論ⅠA　東北大学大学院理学研究科

  6. Advanced Inorganic Chemistry III / Advanced Chemistry and Biochemistry IA　Tohoku University, Graduate School of Science

  7. 自然科学総合実験　東北大学 Undergraduate (liberal arts)

  8. 化学一般実験Ａ　東北大学

  9. 化学Ａ　東北大学

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Social Activities 2

  1. 第４回「ジュニア化学への招待 楽しい化学実験室」講師

    楽しい化学教室「金属の触媒を使って光る液体をつくってみよう」

    2022/12/10 - 2022/12/10

  2. 第２９回教師のための化学教育講座

    2006/08/10 - 2006/08/11