Performance information

• Reactions of Halogermylenes with N‐Heterocyclic Carbenes: Selective Formation of Low Valent Ge(II) Species　　　　　　　　　　　　　　　
  Kei Ota; Shotaro Ikoma; Tomohisa Okuda; Taisei Itakura; Tsukasa Nakahodo; Daisuke Hashizume; Tsukasa Matsuo
  European Journal of Organic Chemistry, Apr. 2025, [Reviewed], [Lead, Corresponding]
  The reactions of the Rind‐based 1,2‐dihalodigermenes, (Eind)BrGe=GeBr(Eind) (1a), and (EMind)ClGe=GeCl(EMind) (1b), with two types of N‐heterocyclic carbenes (NHCs) (Im‐ⁱPr₂Me₂ and Im‐Me₄) result in the formation of the halogermylene mono‐NHC adducts, (Im‐ⁱPr₂Me₂)(Eind)GeBr (2a') and (Im‐ⁱPr₂Me₂)(EMind)GeCl (2b'), and the germyliumylidene cation bis‐NHC adducts, [(Im‐Me₄)₂(Eind)Ge]⁺[Br⁻] (3a) and , with two equivalents of tBuLi in Et2O at low temperatures resulted in the formation of blue solutions derived from the diarylsilylenes, (Rind)2Si: (3). Upon warming the solutions above −20 °C, the blue color gradually faded, accompanying the decomposition of 3 and yielding cyclic hydrosilanes (4) via intramolecular C–H bond insertion at the Si(II) center. The molecular structures of the bulky Eind-based 3b and 4b were confirmed by X-ray crystallography. Thus, at −20 °C, blue crystals were formed (Crystal-A), which were identified as mixed crystals of 3b and 4b. Additionally, colorless crystals of 4b as a singular component were isolated (Crystal-B), whose structure was also determined by an X-ray diffraction analysis. Although the isolation of 3 was difficult due to their thermally labile nature, their structural characteristics and electronic properties were discussed based on the experimental findings complemented by computational results. We also examined the hydrolysis of 3b to afford the silanol, (Eind)2SiH(OH) (5b).
  MDPI AG, Scientific journal
  DOI：https://doi.org/10.3390/ijms25073761
  DOI ID：10.3390/ijms25073761, eISSN：1422-0067, ORCID：156724167
• Selective monooxygenation of diphosphenes with molecular oxygen
  Yuria Kawase; Shota Tsujimoto; Tomohiro Obayashi; Satoshi Kimura; Kanta Ito; Shotaro Ikoma; Kei Ota; Daisuke Hashizume; Tsukasa Matsuo
  Dalton Transactions, Volume：53, Number：5, First page：1956, Last page：1960, 2024, [Reviewed]
  The O₂ splitting mediated by the bulky Rind-based diphosphenes leads to the clean formation of the diphosphene oxides with (O)PP moieties.
  Royal Society of Chemistry (RSC), Scientific journal
  DOI：https://doi.org/10.1039/d3dt04348g
  DOI ID：10.1039/d3dt04348g, ISSN：1477-9226, eISSN：1477-9234, ORCID：151003817
• A Series of Lithium Complexes of Bulky Rind-based Arylthiolate Ligands: Synthesis, Characterization, and Crystal Structures
  Masahiro Hamura; Kohei Sugano; Ryo Matsukura; Kei Ota; Tsukasa Nakahodo; Daisuke Hashizume; Tsukasa Matsuo
  Chemistry Letters, Volume：52, Number：3, First page：140, Last page：143, Mar. 2023, [Reviewed]
  The bulky Rind-based thiols, (Rind)SH (1) [Rind = 1,1,7,7-tetra-R1-3,3,5,5-tetra-R2-s-hydrindacen-4-yl: EMind (a: R1 = Et, R2 = Me), Eind (b: R1 = R2 = Et), and MPhind (c: R1 = Me, R2 = Ph)], reacted with nBuLi in THF to afford a series of lithium arylthiolates, [(Rind)SLi]n(THF)m (2), whose structures were confirmed by an X-ray diffraction analysis. In the solid state, while the less bulky EMind-based lithium thiolate exhibited a linear dimer, [(EMind)SLi]2(THF)4 (2a), or trimer, [(EMind)SLi]3(THF)5 (2a′), the monomeric structures of (Eind)SLi(THF)3 (2b) and (MPhind)SLi(THF)2 (2c) were found for the bulky Eind- and the bulkier MPhind-based systems. The salt metathesis reaction between 2a and FeCl2(THF)1.5 in THF produced the anionic three-coordinate planar Fe(II) thiolate complex, [Li(THF)3][{(EMind)S}3Fe] (3a).
  The Chemical Society of Japan, Scientific journal
  DOI：https://doi.org/10.1246/cl.220532
  DOI ID：10.1246/cl.220532, ISSN：0366-7022, eISSN：1348-0715, ORCID：139996761
• A series of (E)-1,2-diaryldigermenes incorporating bulky Eind groups: structural characteristics and absorption properties
  Shogo Yagura; Naoki Hayakawa; Airi Kuroda; Kei Ota; Rhota Tanishita; Genya Urasaki; Tsukasa Nakahodo; Hidetaka Nakai; Manabu Hoshino; Daisuke Hashizume; Tsukasa Matsuo
  Dalton Transactions, Volume：51, Number：48, First page：18633, Last page：18641, Nov. 2022, [Reviewed]
  We present the synthesis, structural features and absorption properties of a series of (E)-1,2-diaryldigermenes supported by the fused-ring bulky Eind groups.
  Royal Society of Chemistry (RSC), Scientific journal
  DOI：https://doi.org/10.1039/d2dt03427a
  DOI ID：10.1039/d2dt03427a, ISSN：1477-9226, eISSN：1477-9234, ORCID：123829486
• Formation and Reactions of Ge=O Double-bonded Species Bearing EMind Groups　　　　　　　　　　　　　　　
  Airi Kuroda; Naoko Fujita; Tomomi Horita; Kei Ota; Alfredo Rosas-S{\'{a } }nchez; Manabu Hoshino; Daisuke Hashizume; Tsukasa Matsuo
  Chemistry Letters, Volume：51, Number：8, First page：828, Last page：831, Aug. 2022, [Reviewed]
  The Chemical Society of Japan, English, Scientific journal
  DOI：https://doi.org/10.1246/cl.220222
  DOI ID：10.1246/cl.220222, ISSN：0366-7022, ORCID：120876564
• Zero-valent species of group 13–15 elements　　　　　　　　　　　　　　　
  Kei Ota; Rei Kinjo
  Chem, Volume：8, Number：2, First page：340, Last page：350, Feb. 2022, [Reviewed], [Lead]
  Elsevier BV, Scientific journal
  DOI：https://doi.org/10.1016/j.chempr.2022.01.010
  DOI ID：10.1016/j.chempr.2022.01.010, ISSN：2451-9294, ORCID：111475828
• A Crystalline B₄N₂ Dewar Benzene as a Building Block for Conjugated B,N-Chains
  Kei Ota; Rei Kinjo
  Journal of the American Chemical Society, Volume：143, Number：29, First page：11152, Last page：11159, Jul. 2021, [Reviewed], [Lead]
  American Chemical Society (ACS), Scientific journal
  DOI：https://doi.org/10.1021/jacs.1c04860
  DOI ID：10.1021/jacs.1c04860, ISSN：0002-7863, eISSN：1520-5126, ORCID：97045281
• Open questions in boron species with globally 4n π systems
  Kei Ota; Rei Kinjo
  Communications Chemistry, Volume：4, Number：1, Jul. 2021, [Reviewed], [Lead]
  Springer Science and Business Media LLC, Scientific journal
  DOI：https://doi.org/10.1038/s42004-021-00542-x
  DOI ID：10.1038/s42004-021-00542-x, eISSN：2399-3669, ORCID：96913538
• Heavier element-containing aromatics of [4n+2]-electron systems
  Kei Ota; Rei Kinjo
  Chemical Society Reviews, Volume：50, Number：18, First page：10594, Last page：10673, 2021, [Reviewed], [Lead]
  This review focuses on the heavier group 13–15 element-containing heterocycles of [4n+2]-electron systems featuring classical and advanced aromatics.
  Royal Society of Chemistry (RSC), Scientific journal
  DOI：https://doi.org/10.1039/d0cs01354d
  DOI ID：10.1039/d0cs01354d, ISSN：0306-0012, eISSN：1460-4744, ORCID：98235239
• Aromatic nature of neutral and dianionic 1,4-diaza-2,3,5,6-tetraborinine derivatives　　　　　　　　　　　　　　　
  Kei Ota; Rei Kinjo
  RSC Advances, Volume：11, Number：1, First page：592, Last page：598, 2021, [Reviewed], [Lead]
  Royal Society of Chemistry ({RSC}), Scientific journal
  DOI：https://doi.org/10.1039/D0RA09040A
  DOI ID：10.1039/D0RA09040A, ORCID：86185630
• Inorganic Benzene Valence Isomers　　　　　　　　　　　　　　　
  Kei Ota; Rei Kinjo
  Chemistry – An Asian Journal, Volume：15, Number：17, First page：2558, Last page：2574, Sep. 2020, [Reviewed], [Lead]
  Wiley, Scientific journal
  DOI：https://doi.org/10.1002/asia.202000535
  DOI ID：10.1002/asia.202000535, ORCID：78491316
• A Neutral and Aromatic Boron‐Rich Inorganic Benzene　　　　　　　　　　　　　　　
  Kei Ota; Rei Kinjo
  Angewandte Chemie International Edition, Volume：59, Number：16, First page：6572, Last page：6575, Apr. 2020, [Reviewed], [Lead]
  Wiley, English, Scientific journal
  DOI：https://doi.org/10.1002/anie.201915790
  DOI ID：10.1002/anie.201915790, ISSN：1433-7851, ORCID：96101383
• Germylone-bridged bimetallic Ir and Rh complexes　　　　　　　　　　　　　　　
  Bochao Su; Kei Ota; Yongxin Li; Rei Kinjo
  Dalton Transactions, Volume：48, Number：11, First page：3555, Last page：3559, 2019, [Reviewed]
  

  The reactions of germylone 1 with one equivalent of [M(COD)Cl]₂ (M = Ir, Rh) afforded the germylone-bridged bimetallic complexes 2 and 3, which have been spectroscopically and structurally characterized.

  
  Royal Society of Chemistry ({RSC}), English, Scientific journal
  DOI：https://doi.org/10.1039/c9dt00145j
  DOI ID：10.1039/c9dt00145j, ISSN：1477-9226, ORCID：96101384
• Zwitterionic Inorganic Benzene Valence Isomer with σ-Bonding between Two π-Orbitals　　　　　　　　　　　　　　　
  Bochao Su; Kei Ota; Kai Xu; Hajime Hirao; Rei Kinjo
  Journal of the American Chemical Society, Volume：140, Number：38, First page：11921, Last page：11925, Sep. 2018, [Reviewed]
  American Chemical Society ({ACS}), English, Scientific journal
  DOI：https://doi.org/10.1021/jacs.8b08025
  DOI ID：10.1021/jacs.8b08025, ISSN：0002-7863, ORCID：96101379
• Bis(stibahousene)　　　　　　　　　　　　　　　
  Vladimir Ya. Lee; Kei Ota; Yuki Ito; Olga A. Gapurenko; Akira Sekiguchi; Ruslan M. Minyaev; Vladimir I. Minkin; Heinz Gornitzka
  Journal of the American Chemical Society, Volume：139, Number：39, First page：13897, Last page：13902, Oct. 2017, [Reviewed]
  American Chemical Society ({ACS}), English, Scientific journal
  DOI：https://doi.org/10.1021/jacs.7b07712
  DOI ID：10.1021/jacs.7b07712, ISSN：0002-7863, ORCID：96101376

• Synthesis of Heavier Group 14 Element Cations　　　　　　　　　　　　　　　
  Kei Ota; Shotaro Ikoma; Tomohisa Okuda; Tsukasa Matsuo
  Sep. 2024
• Reaction of arylhalogermylenes with NHCs　　　　　　　　　　　　　　　
  Kei Ota; Shotaro Ikoma; Tsukasa Matsuo
  The 14th International Conference on Heteroatom Chemistry (ICHAC-14), Jul. 2024, [Invited]
• Synthesis and reduction of aryl cyclotrisilenylium ion　　　　　　　　　　　　　　　
  K. Ota; R. Ohno; N. Nishimura; T. Matsuo
  20th International Symposium on Silicon Chemistry (ISOS-20), May 2024
• アリール基を有する シクロトリシレニルカチオンの合成　　　　　　　　　　　　　　　
  太田圭; 大野稜真; 松尾司
  Dec. 2022
• Synthesis and Characterization of Boron-Rich Inorganic Benzene　　　　　　　　　　　　　　　
  太田圭; 金城玲
  Dec. 2020
• Synthesis, Characterization and Reactivities of Boron-Rich Dewar Benzene　　　　　　　　　　　　　　　
  Kei Ota; Rei Kinjo
  Dec. 2020
• Unexpected σ-bonding between two π-orbitals on the boron rich inorganic benzene valence isomer　　　　　　　　　　　　　　　
  Kei Ota
  PhD Student Workshop in Organic Chemistry, Nov. 2019
• Zwitterionic Inorganic Benzene Valence Isomer with sigma-Bonding between Two pai-Orbitals　　　　　　　　　　　　　　　
  Kei Ota; Bochao Su; Kai Xu; Hajime Hirao; Rei Kinjo
  Chemistry National Meeting Singapore (ChnmSG 2019), May 2019

• Apr. 2023 - Mar. 2024
  科学技術英語２
• Apr. 2023 - Mar. 2024
  アドバンスト有機化学
• Apr. 2022 - Mar. 2024
  基礎ゼミI・II
• Apr. 2022 - Mar. 2024
  応用化学実験IV
• Apr. 2022 - Mar. 2023
  応用化学実験II

• 2023 - Present
• 2016 - Present

• ホウ素０価単原子の創出とホウ素トランスファー反応への展開　　　　　　　　　　　　　　　
  01 Apr. 2024 - 31 Mar. 2026
  Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
  Grant number：24K17700
• 13族元素0価化学種の創出と元素トランスファー反応への展開　　　　　　　　　　　　　　　
  Aug. 2022 - Mar. 2024
  Grant amount(Total)：2860000, Direct funding：2200000, Indirect funding：660000
  Grant number：22K20561