Propeller-shaped aluminum complexes with an azaperylene core in the ligands, Masahiro Tsukao, Yoshifumi Hashikawa, Nana Toyama, Masahiro Muraoka, Michihisa Murata, Takahiro Sasamori, Atsushi Wakamiya, Yasujiro Murata, Inorganics, 7, 2019 09 01 , © 2019 by the authors. Tris(8-hydroxyquinoline) aluminum(III) (Alq3) and its derivatives, characterized by a propeller-shaped three-dimensionally π-conjugated structure, have been intensively studied in the few past decades on account of their potential utility in optoelectronic applications. Reported herein are the synthesis and properties of π-extended Alq3 complexes that contain an azaperylene core in each ligand. Intramolecular palladium-catalyzed direct C-H arylations or base-promoted arylations were employed to prepare these large Alq3 analogues. A single-crystal X-ray diffraction analysis of one of the obtained Al complexes revealed a unique three-dimensional packing structure within the crystal, i.e., a honeycomb packing along the ab-plane and columnar π-stacks along the c-axis. An Alq3 analogue with azaperylene-dicarboximide ligands exhibited deep blue color in solution with an intense absorption band that extended to 780 nm (λmax = 634 nm; ε = 58,000 M-1 cm-1).
A Purified, Solvent-Intercalated Precursor Complex for Wide-Process-Window Fabrication of Efficient Perovskite Solar Cells and Modules, Masashi Ozaki, Ai Shimazaki, Mina Jung, Yumi Nakaike, Naoki Maruyama, Shinya Yakumaru, Alwani Imanah Rafieh, Takahiro Sasamori, Norihiro Tokitoh, Piyasiri Ekanayake, Yasujiro Murata, Richard Murdey, Atsushi Wakamiya, Angewandte Chemie (International ed. in English), 58, 2019 07 08 , © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. A high-purity methylammonium lead iodide complex with intercalated dimethylformamide (DMF) molecules, CH3 NH3 PbI3 ⋅DMF, is introduced as an effective precursor material for fabricating high-quality solution-processed perovskite layers. Spin-coated films of the solvent-intercalated complex dissolved in pure dimethyl sulfoxide (DMSO) yielded thick, dense perovskite layers after thermal annealing. The low volatility of the pure DMSO solvent extended the allowable time for low-speed spin programs and considerably relaxed the precision needed for the antisolvent addition step. An optimized, reliable fabrication method was devised to take advantage of this extended process window and resulted in highly consistent performance of perovskite solar cell devices, with up to 19.8 % power-conversion efficiency (PCE). The optimized method was also used to fabricate a 22.0 cm2 , eight-cell module with 14.2 % PCE (active area) and 8.64 V output (1.08 V/cell).
Diborative Reduction of Alkynes to 1,2-Diboryl-1,2-Dimetalloalkanes: Its Application for the Synthesis of Diverse 1,2-Bis(boronate)s, Fumiya Takahashi, Keisuke Nogi, Takahiro Sasamori, Hideki Yorimitsu, Organic Letters, 21, 2019 06 21 , © 2019 American Chemical Society. Reduction of alkynes with alkali metals in the presence of B2pin2 results in diboration of alkynes. Distinct from conventional dissolving metal hydrogenations, two carbon-boron bonds and also two carbon-alkali metal bonds can be constructed in one operation to form 1,2-diboryl-1,2-dimetalloalkanes. The 1,2-diboryl-1,2-dimetalloalkanes generated are readily convertible to a wide range of vicinal bis(boronate)s. In particular, oxidation of the 1,2-dianionic species provides (E)-1,2-diborylalkenes, unique anti-selective diboration of alkynes being thus executed.
Selective functionalization of ferrocenyl compounds using a novel solvent free synthetic method for the preparation of bioactive unsymmetrical ferrocenyl derivatives, Avishek Ghosh, Tulasi Barik, Smriti Dewangan, Paresh Kumar Majhi, Takahiro Sasamori, Shaikh M. Mobin, Santanab Giri, Saurav Chatterjee, Applied Organometallic Chemistry, 33, 2019 04 01 , © 2019 John Wiley & Sons, Ltd. A novel solvent free synthetic method has been designed by using rice husk ash (RHA) as solid support for the selective functionalization of ferrocenyl derivatives and described the synthesis of a 1,1′-unsymmetrically bi-functionalized ferrocenyl compounds for their biological evaluation. Single crystal X-ray structural evaluation showed some interesting intra-molecular hydrogen bonding interactions across the chains of the ferrocenyl molecule, while DFT calculation revealed the significance of the orientation between the two cyclopentadienyl rings for the hydrogen bonding interaction. Redox and antibacterial properties have been studied to understand the electronic and biological effect of different hydrazone system and their potential for future application.
The formation of a 1,4-disilabenzene and its isomerization into a disilabenzvalene derivative, Tomohiro Sugahara, Takahiro Sasamori, Norihiro Tokitoh, Dalton Transactions, 48, 2019 01 01 , © 2019 The Royal Society of Chemistry. A stable 1,4-disilabenzene was generated from the reaction of a stable disilyne with 3-hexyne. Its photochemical isomerization afforded the corresponding disilabenzvalene, which was structurally characterized by a single-crystal X-ray diffraction analysis.
Nature of the E⋯E′ interactions (E, E′ = O, S, Se, and Te) at naphthalene 1,8-positions with fine details of the structures: Experimental and theoretical investigations, Satoko Hayashi, Manabu Uegaito, Taro Nishide, Eiichiro Tanaka, Waro Nakanishi, Takahiro Sasamori, Norihiro Tokitoh, Mao Minoura, New Journal of Chemistry, 43, 2019 01 01 , © 2019 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. The intrinsic dynamic and static natures of the E⋯E′ interactions at the 1,8-positions of 1-(MeE)-8-(MeE′)C10H6 [1a-1f (E ≠ E′) and 1g-1j (E = E′)] were elucidated with QTAIM-DFA, after structural determination of 1-(PhE)-8-(PhE′)C10H6 (3a-3f), where (E, E′: x) = (O, S: A), (O, Se: b), (O, Te: c), (S, Se: d), (S, Te: e), (Se, Te: f), (O, O: g), (S, S: h), (Se, Se: i) and (Te, Te: j) (χE ≥ χE′). While the AB structures are confirmed for 3a, 3b and 3d-3f, which consist of the np(E)⋯σ∗(E′-CPh) interactions, the structure was BB for 3c, where the E-CR/E′-CR (R = Ph) bond is perpendicular to the naphthyl plane in A and it is placed on the plane in B. While the AB structures are determined by the p(E)-π(Ph) conjugations, the BB structure is by the crystal packing effect. The BA structure with np(E′)⋯σ∗(E-CPh) was not detected. While the nature of a typical hydrogen bond with covalency was predicted for BB, AA and BA, with the CT-MC (molecular complex formation through charge transfer) nature for AB in 1e and 1f (R = Me for E-CR/E′-CR), the CT-MC nature was predicted for all conformers of 1j, for example. NBO analysis for 1a-1f revealed that the acceptor orbitals contribute much more than the donor orbitals and the order is σ∗(O-CMe: <0.5 kcal mol-1) ≪ σ∗(S-CMe: ≈5 kcal mol-1) ≪ σ∗(Se-CMe: ≈10 kcal mol-1) ≪ σ∗(Te-CMe: ≈16 kcal mol-1) for np(S), np(Se) and np(Te). The E(2) values proportionally correlate to Cii-1 for AB and/or BA of 1a-1j, if analyzed separately for σ∗(S-C), σ∗(Se-C) and σ∗(Te-C).
Pyridinium 5-aminothiazoles: specific photophysical properties and vapochromism in halogenated solvents, Kirara Yamaguchi, Toshiaki Murai, Yuki Tsuchiya, Yohei Miwa, Shoichi Kutsumizu, Takahiro Sasamori, Norihiro Tokitoh, RSC Advances, 7, 2017 01 01 , © The Royal Society of Chemistry. Treatment of pyridyl-5-aminothiazoles (1-4) with alkyl triflates or benzyl iodide afforded the corresponding pyridinium 5-aminothiazoles (5-10), which exhibited bathochromically shifted absorption and fluorescence spectra relative to those of 1-4. Moreover, the vapochromic properties of 5 specific to halogenated solvents were examined by powder X-ray diffraction analysis. Pmma films containing 5 can thus be used to detect halogenated solvents, especially CH2Cl2
Frontispiece: Isolation and Ambident Reactivity of a Chlorogermylenoid, Yuko Suzuki, Takahiro Sasamori, Jing Dong Guo, Shigeru Nagase, Norihiro Tokitoh, Chemistry - A European Journal, 22, 2016 09 19
Inside Cover: Activation of Dihydrogen by Masked Doubly Bonded Aluminum Species (Angew. Chem. Int. Ed. 41/2016), Koichi Nagata, Takahiro Murosaki, Tomohiro Agou, Takahiro Sasamori, Tsukasa Matsuo, Norihiro Tokitoh, Angewandte Chemie - International Edition, 55, 2016 01 01
π-Electron Redox Systems of Heavier Group 15 Elements, Takahiro Sasamori, Norihiro Tokitoh, Rainer Streubel, Organic Redox Systems: Synthesis, Properties, and Applications, 2015 12 21 , © 2016 by John Wiley & Sons, Inc. All rights reserved. This chapter focuses on the electrochemical properties of stable dipnictenes, and introduces d-π electron systems including E=E π-electron systems. It shows a summary of the redox potentials of diphosphene, distibene and dibismuthene obtained from cyclic voltammetry in CH2Cl2 (oxidation) and THF (reduction). The characteristic trend for the π-electron systems involving heavier group 15 elements reported in the chapter is counterintuitive to the expectation that the energy level of the -π-orbital of an E=E double bond should be monotonously lowered upon descending group 15. It is feasible to expect that -π-bonds between heavier group 15 elements should be more effective -π-electron spacers relative to those consisting of second row elements. Detailed experimental investigations regarding -π-bonds between heavier group 15 elements are described in the chapter and suggest that such -π-bonds between heavier group 15 elements should work as effective -π-spacers for transition metal moieties.
Low-Coordinate Main Group Compounds - Group 14 (Si, Ge), N. Tokitoh, T. Sasamori, Comprehensive Inorganic Chemistry II (Second Edition): From Elements to Applications, 1, 2013 08 01 , Recent papers on stable σ2,λ2-silylene and σ2,λ2-germylene, heavier analogs of a carbene, are introduced and summarized in this chapter. Since a silylene and a germylene are intrinsically highly reactive, it is difficult to synthesize and isolate them under ambient conditions. It should be noted that the thermodynamic and kinetic stabilization methods play an important role in the chemistry of stable silylenes and germylenes. © 2013 Elsevier Ltd. All rights reserved.
Erratum: A ferrocenyldiphosphene-platinum complex: Structural features and theoretical calculations (Organometallics (2008) 27 (4265-4268)), Noriyoshi Nagahora, Takahiro Sasamori, Norihiro Tokitoh, Organometallics, 27, 2008 10 13
Kinetically stabilized 1,1'-bis[(E)-dipnosphenyl]ferrocenes: syntheses, structures, properties, and reactivity, Noriyoshi Nagahora, Takahiro Sasamori, Yasuaki Watanabe, Yukio Furukawa, Norihiro Tokitoh, Bulletin of the Chemical Society of Japan, 80, 2007 12 01 , Kinetically stabilized 1,1'-bis[(E)-diphosphenyl]ferrocenes were synthesized by taking advantage of extremely bulky substituents, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (denoted as Tbt) and 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris(trimethylsilyl)methyl]phenyl (denoted as Bbt) groups, and characterized by the spectroscopic and X-ray crystallo-graphic analyses. The electronic structures of the 1,1'-bis[(E)-diphosphenyl]ferrocenes were determined by analyzing electronic spectra, the transitions of which were reasonably assigned based on theoretical calculations. In the cyclic vol-tammograms, there were two well-defined reversible one-electron reduction couples corresponding to the intramolecular two diphosphene units. Furthermore, the 1,1'-bis[(E)-diphosphenyl]ferrocene was found to undergo ligand-exchange reactions with group 6 metal carbonyl complexes along with the E-to-Z isomerization of the diphosphene moieties, leading to the formation of the corresponding 1,1'-bis[(Z)-diphosphenyl]ferrocene group 6 metal tetracarbonyl complexes, [M(CO) 4{(Z,Z)-(BbtP=PC 5H4)2Fe}] (M = Cr, Mo, and W). The molecular structures of these complexes were determined by spectroscopic analyses ( 1H, 13C, and 31PNMR spectra, and UV-vis spectra), and that of the tungsten complex was determined by X-ray crystallographic analysis. Several types of d→ π*p=p electron transitions due to the iron and group 6 metals were detected by using UV-vis spectroscopy, and these results were supported by theoretical calculations. © 2007 The Chemical Society of Japan.
Synthesis and characterization of functionalized ferrocenylsilanes bearing a bulky substituent, Takahiro Sasamori, Megumi Kobayashi, Noriyoshi Nagahora, Yusuke Sugiyama, Norihiro Tokitoh, Silicon Chemistry, 3, 2007 01 01 , Several types of overcrowded ferrocenylsilanes, Tbt(Fc)SiX2 (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Fc = ferrocenyl, X = H, OH, and Br) were synthesized and characterized. In addition, DFT calculations for ferrocenylsilanediol systems indicated the existence of the intramolecular hydrogen bonding between the Fe atom and H-O moiety in Tbt(Fc)Si(OH)2. © Springer Science+Business Media, Inc. 2006.
[2+3] Cycloaddition reaction of a kinetically stabilized distibene with a nitrile oxide leading to the formation of a unique heterocyclic compound, T. Sasamori, E. Mieda, N. Nagahora, N. Tokitoh, Khimiya Geterotsiklicheskikh Soedinenii, 2006 12 01 , The synthesis of a 1,5,2,3-oxazadistibacyclopent-4-ene derivative by the [2+3] cycloaddition reaction of a kinetically stabilized distibene, BbtSb=SbBbt (Bbt = 2,6-bis[bis(trimethylsilyl)-methyl]-4-[tris(trimethylsilyl)methyl]phenyl) with MesCNO (Mes = mesityl) has been performed.
[2+3]Cycloaddition reaction of a kinetically stabilized distibene with a nitrile oxide leading to the formation of a unique heterocyclic compound, T. Sasamori, E. Mieda, N. Nagahora, N. Tokitoh, Chemistry of Heterocyclic Compounds, 42, 2006 12 01 , The synthesis of a 1-oxa-5-aza-2,3-distibacyclopent-4-ene derivative by the [2+3]cycloaddition reaction of a kinetically stabilized distibene, BbtSb=SbBbt (Bbt = 2,6-bis[bis(trimethylsilyl)methyl]-4-[tris-(trimethylsilyl)methyl]phenyl) , with MesCNO (Mes = mesityl) has been performed. © 2006 Springer Science+Business Media, Inc.
Syntheses, structures, and properties of the first stable 1,1′-bis(diphosphenyl)ferrocenes, Noriyoshi Nagahora, Takahiro Sasamori, Norihiro Tokitoh, Chemistry Letters, 35, 2006 02 05 , Kinetically stabilized 1,1′-bis(diphosphenyl)ferrocenes have been synthesized by taking advantage of extremely bulky substituents, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt) and 2,6- bis[bis(trimethylsilyl)rnethyl]-4-[tris(trimethylsilyl)-methyl]phenyl (Bbt) groups, and fully characterized by the spectroscopic and X-ray crystallographic analyses. The electrochemical behavior showed well-defined two reversible one-electron reduction couples. Copyright © 2006 The Chemical Society of Japan.
Synthesis of bis(germacyclopropa)benzenes and structures of their annelated benzene rings, Tomoyuki Tajima, Takahiro Sasamori, Nobuhiro Takeda, Norihiro Tokitoh, Ken Yoshida, Masaru Nakahara, Organometallics, 25, 2006 01 02 , Extremely hindered bis(germacyclopropa)benzenes (3a,b; the IUPAC name is 4,8-digermatricyclo[5.1.0.03,5]octa-1,3(5),6-triene) were synthesized as stable crystalline compounds by the reaction of the corresponding dilithiogermane Tbt(Dip)GeLi2 (8; Tbt = 2,4,6- tris[bis(trimethylsilyl)methyl]phenyl, Dip = 2,6-diisopropylphenyl) with 1,2,4,5-tetrabromobenzene. The structures of the two stereoisomeric bis(germacyclopropa)benzenes (3a, cis isomer; 3b, trans isomer) were definitively determined by X-ray crystallographic analysis. The central benzene ring of 3a was found to be folded, in contrast to the planar benzene ring of 3b. The X-ray crystallographic analyses of 3a and 3b and the theoretical calculations for some model molecules revealed that the annelated benzene rings have no distinct bond alternation. © 2006 American Chemical Society.
Systematic Studies on Homo- and Heteronuclear Doubly Bonded Compounds of Heavier Group 15 Elements, N. Tokitoh ,N. Tokitoh, T. Sasamori, N. Takeda, S. Nagase (Kyushu University, Institute for Chemical Research, Kyoto University, Tokyo Metropolitan UniversIty), XVth International Conference on Phosphorus Chemistry ,仙台, 177, 2001 07 29 , Refereed, The first stable phosphabismuthene (R1-P=Bi-R2) and stibabismuthene (R1-Sb=Bi-R2) were successfully synthesized by taking advantage of efficient steric protection groups, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt), 2,6-bis[bis(trimethylsilyl)-methyl]-4-[tris(trimethylsilyl)methyl]phenyl (Bbt), and 2,4,6-tri-t-butylphenyl (Mes*). Their spectroscopic properties and structural parameters were systematically compared with those of previously reported stable, homonuclear, doubly bonded systems, such as diphosphene, diarsene, distibene, and dibismuthene.
Bis[2-(phenylsulfanyl)benzenethiolato]palladium(II), Daisuke Shirnizu, Nobuhiro Takeda, Takahiro Sasamori, Norihiro Tokitoh, Acta Crystallographica Section E: Structure Reports Online, 62, 2006 01 01 , In the title complex, [Pd(C12H9S2) 2], the central Pd atom has a slightly distorted cis-planar four-coordinate geometry defined by the two thiolate and the two sulfanyl S atoms from two 2-(phenylsulfanyl)benzenethiolate ligands. The two phenyl groups are on the same side of the PdS4 plane and indicative of the typical arrangement of intermolecular π-stacking. Moreover, an intermolecular C-H⋯π stacking interaction links molecules to one another. © 2006 International Union of Crystallography Printed in Great Britain - all rights reserved.
Synthesis and Reactions of the First Stable Phosphabismuthene, a Novel Compound with PhosphorusBismuth Double Bond, (poster), T. Sasamori ,T. Sasamori, N. Takeda, N. Tokitoh, (Kyushu University, Institute for Chemical Research, Kyoto University), XVth International Conference on Phosphorus Chemistry ,仙台, 177, 2001 07 29 , Refereed
Synthesis and properties of η6-silabenzene-M(CO)3 complexes (M = Cr, Mo), Akihiro Shinohara, Nobuhiro Takeda, Takahiro Sasamori, Takeshi Matsumoto, Norihiro Tokitoh, Organometallics, 24, 2005 12 05 , Synthesis of the first neutral η6-silabenzene complexes [M(η6-C5H5SiTbt)(CO)3] (M = Cr (2), Mo (3); Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl) was achieved by the ligand exchange reactions of [M(CH3CN)3(CO) 3] (M = Cr, Mo) with the kinetically stabilized silabenzene 1. X-ray crystallographic analysis of 2 revealed that the -coordinated silabenzene rings of the complexes have almost planar geometries with delocalized η-electron structures. The structures of η-silabenzene complexes 2 and 3 were fully characterized by NMR, UV/vis, and IR spectroscopic analysis. All the 1H, 13C, and 29Si NMR chemical shifts of the SiC5H5 rings of 2 and 3 were shifted to upper field relative to those for silabenzene 1, due to the π-coordination of the silabenzene ring to the metal center. The carbonyl stretching frequencies of 2 and 3 were observed in a region of lower wavenumber as compared to those of the corresponding group 6 metal complexes of benzene. In the UV/vis spectra of 2 and 3, the absorption maxima were slightly red-shifted compared to those for the corresponding benzene complexes. The formation of η6-silabenzene complexes 2 and 3 is very important from the viewpoints of the novel chemical reactivity of silaaromatics. Silabenzene complexes 2 and 3 were thermally stable under an inert atmosphere but air and moisture sensitive. These compounds underwent ready addition reactions with water exclusively at their 1,2-positions to give the corresponding hydroxysilane 8a. The high regioselectivity observed for the addition reactions to 2 and 3 is in a sharp contrast to the competitive 1,2- and 1,4-addition reactions of free silabenzene 1 with water. © 2005 American Chemical Society.
Synthesis of the First Stable Bismuth Antimony Double-bond Compound (poster), N. Takeda ,N. Takeda, T. Sasamori, N. Tokitoh, The 8th International Kyoto Conference on New Aspects of Organic Chemistry ,京都, 2000 07 11 , Refereed
Novel Disproportionation Reaction of stable Stibabismuthene via 1,2,3,4-Distibadibismetane Derivative (Poster), N. Tokitoh ,N. Tokitoh, T. Sasamori., N. Takeda (Graduate School of Science, Kyushu University, Institute for Chemical Research, Kyoto University), The 9th International Conference on Inorganic Ring Systems ,University of Saarland, Saarbrcken, Germany, 2000 07 23 , Refereed
Synthesis and structure of a stable 1,3-dihydro-2-ferrocenyltriphosphane and its thermal decomposition giving a ferrocenyl diphosphene(poster), N. Nagahora (Kyoto Univ.) ,N. Nagahora; T. Sasamori; N. Takeda; N. Tokitoh, 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem 2005) ,Honolulu, Hawaii, USA, 2000 12 14 , Refereed
Extended hypervalent C-Z---O---Z-C (Z = O, S and Se) 5c-6e bonds in anthraquinone system: Structural, spectroscopic and theoretical investigations (poster), T. Nakamoto (Wakayama Univ.) ,T. Nakamoto; S. Hayashi; W. Nakanishi; T. Sasamori; N. Tokitoh (Wakayama Univ. & Kyoto Univ.), 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem 2005) ,Honolulu, Hawaii, USA, 2000 12 14 , Refereed
Reactions of kinetically stabilized doubly-bonded systems between heavier group 15 elements, T. Sasamori (Kyoto Univ.) ,T. Sasamori; E. Mieda; N. Nagahora; N. Takeda; N. Tokitoh(Kyoto Univ.), 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem 2005) ,Honolulu, Hawaii, USA, 2000 12 14 , Refereed
A Novel Class of Heteronuclear Doubly Bonded Compounds between Heavier Group 15 Elements (poster), T. Sasamori ,T. Sasamori, N. Takeda, N. Tokitoh, (Department of Chemistry and Physics of Condensed Matter, Graduate School of Science, Kyushu University, Institute for Chemical Research, Kyoto University), 2000 International Chemical Congress of Pacific Basin Societies ,Honolulu, Hawaii, USA, 2000 12 14 , Refereed
Kinetically stabilized tintellurium doublebond compound: Synthesis, structure and reactivities(poster), T. Tajima (Kyoto Univ.) ,T. Tajima; N. Takeda; T. Sasamori; N. Tokitoh, 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem 2005) ,Honolulu, Hawaii, USA, 2000 12 14 , Refereed
Synthesis of Novel Heteronuclear Double Bonded Systems between Heavier Group 15 Elements and Their Properties (poster), T. Sasamori ,T. Sasamori, N. Takeda, N. Tokitoh, (Kyushu University, Institute for Chemical Research, Kyoto University), The First Kyoto COE Symposium on "Elements Science" ,京都, 2001 01 26 , Refereed
Chalcogenation Reactions of Kinetically Stabilized Doubly-bonded Systems between Heavier Group 15 Elements, (poster), T. Sasamori ,T. Sasamori, N. Takeda, N. Tokitoh, (Kyushu University, Institute for Chemical Research, Kyoto University), International Symposium on the Organic Chemistry of Sulfur XX (ISOCS XX) ,Arizona, USA., 2002 07 14 , Refereed
Systematic Studies on Doubly Bonded Systems between Heavier Group 15 Elements (poster), T. Sasamori ,T. Sasamori, N. Takeda, N. Tokitoh, (Institute for Chemical Research, Kyoto University), The 2nd Kyoto COE Symposium on "Elements Science" “Highly Selective Synthesis and Materials Science” ,京都, 2003 01 10 , Refereed
Synthetic Study on Boron-Stabilized Silyl Anions Utilizing Novel Functionalized Silylboranes (poster), T. Kajiwara ,T. Kajiwara, N. Takeda, T. Sasamori, and N. Tokitoh (Institute for Chemical Research, Kyoto University), The 10th Kyushu International Symposium on Physical Organic Chemistry ,福岡, 2003 09 30 , Refereed
Synthesis and Structures of Kinetically Stabilized Heavier Dipnictenes (poster), T. Sasamori ,T. Sasamori, T. Yamasaki, N. Takeda, N. Tokitoh, (Institute for Chemical Research, Kyoto University), The 9th International Kyoto Conference on New Aspects of Organic Chemistry ,京都, 2003 11 10 , Refereed
Synthesis of Polythioethers Tethered with Bulky Aryl Groups and Their Complexation with Late-transition Metals, N. Tokitoh (Kyoto Univ.) ,Norihiro Tokitoh, Daisuke Shimizu, Nobuhiro Takeda, and Takahiro Sasamori, 21st International Symposium on the Organic Chemistry of Sulfur ,Madrid, Spain, 180, 2004 07 04 , Refereed, New types of o-phenylene-bridged polythioethers tethered with extremely bulky aryl groups at their terminal sulfur atoms, such as TbtS(o-Phen)S(o-Phen) S(o-Phen)STbt (1) and TbtS(o-Phen)S(o-Phen)SS(o-Phen)S(o-Phen)STbt (2) (Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, o-Phen = o-phenylene), were synthesized and subjected to the complexation with several kinds of late-transition metals. In the case of polythioether 1, the reaction with RhCl3·3H2O in benzene/EtOH resulted in the formation of a unique bimetallic complex, in which a part of ligand 1 is lost and the resulting sulfur atom is directly bound to the other Rh metal center. Interestingly, similar treatment of 1 with IrCl3·3H 2O afforded ethyl-coordinated mononuclear Ir complex. Furthermore, 1 underwent complexation with Na2PdCl4 in EtOH to give the corresponding square planar dichloropalladium complex coordinated with two inner sulfur atoms of 1, while the S6-ligand 2 reacted with excess of Pd(PPh3)4 in benzene to afford a quite interesting trinuclear Pd complex via multi-step metal insertion reactions. Copyright © Taylor & Francis Inc.
Synthesis, Structure, and Properties of a Novel Ferrocenyl-substituted Diphosphene (poster), N. Nagahora ,N. Nagahora, T. Sasamori, N. Takeda, N. Tokitoh (Institute for Chemical Research, Kyoto University), The 3rd Kyoto COE Symposium on "Elements Science" ,京都, 2004 01 09 , Refereed
The Latest Frontiers of Organoelement Chemistry, N. Tokitoh ,N. Tokitoh, N. Takeda, T. Sasamori, The 3rd Kyoto COE Symposium on "Elements Science" ,Kyoto , Japan, 2004 01 09 , Refereed
Studies on Reactivities of Doubly Bonded Systems between Heavier Group 15 Elements toward Elemental Chalcogens (poster), T. Sasamori ,T. Sasamori, E. Mieda, N. Takeda, N. Tokitoh (Institute for Chemical Research, Kyoto University), The 3rd Kyoto COE Symposium on "Elements Science" ,京都, 2004 01 09 , Refereed
Reactions of an overcrowded Germacyclopropabenzene with Metal Carbonyl Comolexes (poster), T. Tajima (kyoto Univ.) ,T. Tajima, T. Sasaki, T. Sasamori, N. Takeda, N. Tokitoh (Kyoto Univ.), XI International Conference On the Coordination and Organometallic Chemistry Of Germanium, Tin and Lead ,Santa Fe, New Mexico, 2004 06 27 , Refereed
Synthesis of Silylboranes by the Reactions of a Bulky Silylene with Boron Compounds and Their Application to the Synthesis of a Borylsilyl Anion, N. Takeda (Kyoto Univ.) ,N. Takeda, T. Kajiwara, T. Sasamori, and N. Tokitoh (Kyoto Univ.), Heron Island Conference on Reactive Intermediates & Unusual Molecules ,Queensland, Australia, 2004 07 17 , Refereed
New Aspect in the Chemistry of Metallaaromatics of Heavier Group 14 Elements (含高周期14族元素芳香族化合物の化学の新展開), N. Tokitoh (Kyoto Univ.) ,N. Tokitoh, A. Shinohara, Y. Mizuhata, T. Sasamori, N. Takeda (Kyoto Univ.), The 12th Japan-Korea Joint Symposium on Organometallic and Coordination Chemistry (第12回有機金属および配位化学に関する日韓合同シンポジウム) ,仙台, 宮城, 2004 08 03 , Refereed
Structure and Reactivity of Kinetically Stabilized Silaaromatic Species (poster), A. Shinohara ,Akihiro Shinohara, Nobuhiro Takeda, Takahiro Sasamori, and Norihiro Tokitoh, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Synthesis of a Novel Polythioether Ligand Bearing Bulky Substituents and It’s Application to the Synthesis of Late Transition Metal Complexes (poster), D. Shimizu ,Daisuke Shimizu, Nobuhiro Takeda, Takahiro Sasamori, and Norihiro Tokitoh, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Synthesis of Low-valent Titanium Complexes Bearing an Extremely Bulkyβ-Diketiminato Ligand (poster), H. Hamaki ,Hirofumi HAMAKI, Nobuhiro TAKEDA, Takahiro SASAMORI and Norihiro TOKITOH, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Synthesis, Structure, and Redox Properties of a Kinetically Stabilized Ferrocenyl Diphosphene (poster), N. Nagahora ,Noriyoshi Nagahora, Takahiro Sasamori, Nobuhiro Takeda, and Norihiro Tokitoh, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Generation and Reactions of Overcrowded Dimetallastannane Derivatives, N. Tokitoh ,Tomoyuki Tajima, Nobuhiro Takeda, Takahiro Sasamori, and Norihiro Tokitoh (Kyoto Univ.), THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Synthesis and Reactions of the First Borylsilyl Anion (poster), T. Kajiwara ,Takashi Kajiwara, Nobuhiro Takeda, Takahiro Sasamori, and Norihiro Tokitoh, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Systematic Studies on Properties of Kinetically Stabilized Doubly Bonded Systems of Heavier Group 15 Elements, T. Sasamori ,Takahiro Sasamori, Eiko Mieda, Noriyoshi Nagahora, Nobuhiro Takeda, and Norihiro Tokitoh (Kyoto Univ.), THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Generation of 9-Stannaphenanthrene Bearing a Bulky Substituent (poster), Y. Mizuhata ,Yoshiyuki MIZUHATA, Nobuhiro TAKEDA, Takahiro SASAMORI, and Norihiro TOKITOH, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Synthesis of a Dibromodigermene Derivative Utilizing Kinetic Stabilization and Its Properties (poster), Y. Sugiyama ,Yusuke Sugiyama, Takahiro Sasamori, Nobuhiro Takeda, and Norihiro Tokitoh, THE 7th IUPAC INTERNATIONAL CONFERENCE ON HETEROATOM CHEMISTRY (ICHAC-7) ,Shanghai, P. R. China, 2004 08 20 , Refereed
Cycloaddition Reactions of 9-Silaanthracene with Polycyclic Aromatic Hydrocarbons (poster), A. Shinohara (Kyoto Univ.) ,Akihiro Shinohara, Nobuhiro Takeda, Takahiro Sasamori, and Norihiro Tokitoh, The 4th International Symposium of the Kyoto COE Project "Elements Science" ,京都, 2005 01 06 , Refereed
Synthesis and Structures of Pd, Rh, and Ir Complexes Bearing a Novel Bulky Polythioether Ligand (poster), D. Shimizu (Kyoto Univ,) ,Daisuke Shimizu, Nobuhiro Takeda, Takahiro Sasamori, Norihiro Tokitoh, The 4th International Symposium of the Kyoto COE Project "Elements Science" ,, 2005 01 06 , Refereed
The First Stable 1,3-Dihydrotriphosphane: Synthesis, Structure, and Thermolysis (poster), N. Nagahora (Kyoto Univ.) ,N. Nagahora, T. Sasamori, N. Takeda, N. Tokitoh (Institute for Chemical Research, Kyoto University), The 4th International Symposium of the Kyoto COE Project "Elements Science" ,京都, 2005 01 06 , Refereed
Synthesis and Properties of Boron-stabilized Silyl Anions: Experimental and Theoretical Study (poster), T. Kajiwara (Kyoto Univ.) ,T. Kajiwara, N. Takeda, T. Sasamori, and N. Tokitoh (Institute for Chemical Research, Kyoto University), The 4th International Symposium of the Kyoto COE Project "Elements Science" ,京都, 2005 01 06 , Refereed
Stable Bis(metallacyclopropa)benzenes of Heavier Group 14 Elements (poster), T. Tajima (kyoto Univ.) ,Tomoyuki Tajima, Nobuhiro Takeda, Takahiro Sasamori, Norihiro Tokitoh, The 4th International Symposium of the Kyoto COE Project "Elements Science" ,京都, 2005 01 06 , Refereed
Synthesis of 9-Stannnaphenanthrene by Taking Advantage of Steric Protection (poster), Y. Mizuhata (Kyoto Univ) ,Yoshiyuki Mizuhata, Nobuhiro Takeda, Takahiro Sasamori, Norihiro Tokitoh, The 4th International Symposium of the Kyoto COE Project "Elements Science" ,, 2005 01 06 , Refereed
Synthesis of a Dibromodigermene Derivative Bearing Bulky Substituents and Its Properties (poster), Y. Sugiyama (Kyoto Univ.) ,Yusuke Sugiyama, Takahiro Sasamori, Nobuhiro Takeda, Norihiro Tokitoh, The 4th International Symposium of the Kyoto COE Project "Elements Science" ,, 2005 01 06 , Refereed
Synthesis of an Overcrowded 1,3-Dihydrotriphosphane and Its Thermolysis Leading to the Formation of the Corresponding Diphophene (poster), T. Sasamori (Kyoto Univ.) ,Noriyoshi Hagahora, Takahiro Sasamori, and Norihiro Tokitoh (Kyoto University, Japan), The 11th Kyushu International Symposium on Physical Organic Chemistry ,福岡, 2005 09 12 , Refereed
Synthesis, Structure, and Reactivities of the First Stable Metallacyclopropabenzenes, N. Tokitoh ,N. Tokitoh, T. Sasaki, T. Sasamori, and N. Takeda, (Institute for Chemical Research, Kyoto University), The 10th Japan-Korea Joint symposium on Organometallic and Coordination Chemistry ,つくば, 2013 06 01 , Refereed
Synthesis and Structures of the First Stable 1,2-Chalcogenagermetes, N. Tokitoh ,N. TokitohT. Sasaki, T. Sasamori, and N. Takeda, (Institute for Chemical Research, Kyoto University), The sixth International Conferece on Heteroatom Chemistry ,Lodz, Poland, 2013 06 01 , Refereed