A5051902638- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
- Metal complexes synthesis and properties
- Asymmetric Hydrogenation and Catalysis
- Magnetism in coordination complexes
- Nanocluster Synthesis and Applications
- Metal-Catalyzed Oxygenation Mechanisms
- Metal-Organic Frameworks: Synthesis and Applications
- Carbohydrate Chemistry and Synthesis
- Carbon dioxide utilization in catalysis
- Synthesis and characterization of novel inorganic/organometallic compounds
- Catalytic Cross-Coupling Reactions
- Lanthanide and Transition Metal Complexes
- Metalloenzymes and iron-sulfur proteins
- Ferrocene Chemistry and Applications
- Polyoxometalates: Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Enzyme Structure and Function
- Inorganic Chemistry and Materials
- Catalytic Alkyne Reactions
- Molecular Junctions and Nanostructures
- Cyclopropane Reaction Mechanisms
- Amino Acid Enzymes and Metabolism
Nara Women's University
2014-2024
National Archives and Records Administration
2016-2019
Weatherford College
2009
Kwansei Gakuin University
2000-2006
Toho University
1992-2004
Tokyo University of Science
2004
Tokyo Institute of Technology
1997-2004
Osaka City University
1996-2001
Kindai University
2001
Kyoto Pharmaceutical University
2000
Thermoelectrics is a challenging issue for modern and future energy conversion recovery technology. Carbon nanotubes are promising active thermoelectic materials owing to their narrow bandgap high charge carrier mobility they can be integrated into flexible thermoelectrics that recover any waste heat. We here report air-stable n-type single walled carbon with variety of weak electron donors in the range HOMO level between ca. −4.4 eV −5.6 eV, which partial uphill injection from dopant...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses of Mixed-Metal Sulfide Cubane-Type Clusters with the Novel PdMo3S4 Core and Reactivities Unique Tetrahedral Pd Site Surrounded by Ligands toward Alkenes, CO, tBuNC, AlkynesTakashi MurataTakashi MurataMore Takashi Murata, Yasushi MizobeYasushi MizobeMore Mizobe, Hong GaoHong GaoMore Gao, Youichi IshiiYouichi IshiiMore Ishii, Takanori WakabayashiTakanori WakabayashiMore Wakabayashi, Fumio NakanoFumio NakanoMore Nakano, Tomoaki TanaseTomoaki...
Hexanuclear copper hydride complexes, [Cu6(μ3-H)2(meso-L4)3(RNC)4](PF6)4 (R = tBu (6a), Cy (6b)), were prepared by using a new linear tetraphosphine, meso-Ph2PCH2P(Ph)(CH2)4P(Ph)CH2PPh2 (meso-L4), and converted into active catalysts of [Cu2(μ-O2CH)(meso-L4)(RNC)2]+ under the reaction conditions formic acid dehydrogenation, where unsymmetric dinuclear sites supported tetradentate phosphine isocyanide ligands essential to demonstrate effective catalytic activity.
A flexible building block: Flexible tetragold(I) chain complexes supported by a new single methylene-bridged tetraphosphine ligand were synthesized and further transformed into discrete linear octagold(I) {Au(8)} cyclic hexagold(I) {Au(6)} structures reaction with KI NaAuCl(4), respectively (see picture, Au purple, Cl dark green, PF(6) light I pink). The tetragold are also luminescent at room temperature.
Abstract A series of tetragold(I) complexes supported by tetraphosphine ligands, meso ‐ and rac ‐bis[(diphenylphosphinomethyl)phenylphosphino]methane ( ‐dpmppm) were synthesized characterized to show that the tetranuclear Au I alignment varies depending on syn anti ‐arrangements two dpmppm ligands with respect metal chain. The structures ‐[Au 4 2 X]X′ 3 (X=Cl; X′=Cl a ), PF 6 b BF c )) ]X (X=PF d e TfO f ); TfO=triflate) involved bent core counter anion X incorporated into pocket. Complexes...
Abstract Reactions of meso ‐bis[(diphenylphosphinomethyl)phenylphosphino]methane (dpmppm) with Cu I species in the presence NaBH 4 afforded di‐ and tetranuclear copper hydride complexes, [Cu 2 (μ‐H)(μ‐dpmppm) ]X ( 1 ) (μ‐H) (μ ‐H)(μ‐dpmppm) (X=BF , PF 6 ). Complex undergoes facile insertion CO (1 atm) at room temperature, leading to a formate‐bridged dicopper complex (μ‐HCOO)(dpmppm) 3 The experimental DFT theoretical studies clearly demonstrate that into unit occurred flexible platform....
Abstract A copper hydride cluster [Cu 8 (μ‐H) 6 (μ‐dppm) 5 ](PF ) 2 (dppm=bis(diphenylphosphino)methane) was prepared from reaction of [CuH(PPh 3 )] with dppm in the presence [Cu(CH CN) 4 ]PF and exhibited fluxional behaviors solution where hydrides phosphines are scrambling around trans ‐bicapped octahedral Cu framework. The H complex showed facile reactivity CO (1 atm, RT) to afford a tricopper complex, (μ‐H)(μ‐O CH)(μ‐dppm) , which could be developed unprecedented hydrosilylation...
A piece of jewelry is the complex [Pt4M2(μ-H)(μ-dpmp)4(XylNC)2](PF6)3 (M=Pt, see structure), which contains longest platinum chain characterized so far. This and related compound with M=Pd are redox-active can be readily oxidized to electron-deficient clusters [Pt4M2(μ-dpmp)4(XylNC)2](PF6)4 Pd) dynamic structural changes in metal strings. Xyl=2,6-dimethylphenyl, dpmp=bis(diphenylphosphanylmethyl)phenylphosphane.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel C-2 epimerization of aldoses promoted by nickel(II) diamine complexes, involving a stereospecific pinacol-type 1,2-carbon shiftTomoaki Tanase, Fumihiko Shimizu, Manabu Kuse, Shigenobu Yano, Masanobu Hidai, and Sadao YoshikawaCite this: Inorg. Chem. 1988, 27, 23, 4085–4094Publication Date (Print):November 1, 1988Publication History Published online1 May 2002Published inissue 1 November 1988https://doi.org/10.1021/ic00296a004Request reuse...
Linearly ordered tetraphosphine, meso-bis[(diphenylphosphinomethyl)phenylphosphino]methane (dpmppm), readily reacted with 4 equiv. of CuX in dichloromethane to afford octanuclear copper(I) complexes, [Cu8(μ-X)8(μ-dpmppm)2] (X = Cl (1a), Br (1b), I (1c)), which involve a ladder-type {Cu8(μ-X)2(μ3-X)6} core supported by two dpmppm ligands anti arrangement. Complex 1a was further transformed treatment Cu(OTf)2 into [Cu8(μ-X)6(OTf)2(μ-dpmppm)2] (2) TfO anions attached both end the Cu8 ladder....
Abstract A linear tetraphosphine, meso‐bis[(diphenylphosphinomethyl)phenylphosphino]methane (dpmppm) was used to synthesize octapalladium‐extended metal atom chains as discrete molecules of [Pd 8 (μ‐dpmppm) 4 ](BF ) ( 1 and L 2 (L=2,6‐xylyl isocyanide (XylNC; ), acetonitrile 3 N,N‐dimethylformamide (dmf; )), which are stable in the solution states show interesting temperature‐dependent photochemical properties near IR region. Variable temperature NMR studies demonstrated that at higher T≈140...
By using a linear tetraphosphine, meso-bis[(diphenylphosphinomethyl)phenylphosphino]methane (dpmppm), nona- and hexadecanuclear copper hydride clusters, [Cu9 H7 (μ-dpmppm)3 ]X2 (X=Cl (1 a), Br b), I c), PF6 d)) [Cu16 H14 (μ-dpmppm)4 (X2 =I2 (2 (4/3) ⋅(2/3) OH were synthesized characterized. They form copper-hydride cages of apex-truncated supertetrahedral {Cu9 }2+ square-face-capped cuboctahedral {Cu16 structures. The positions estimated by DFT calculations to be facially dispersed around...
An uncommon structure: The novel title compounds (see scheme) were prepared and fully characterized. tetranuclear complex contains a hexagonal Pd4Si3 core involving one central Pd atom, three outer atoms, bridging Si atoms within the same plane, whereas dumbbell-shaped octanuclear is composed of two groups bridged by diphosphine ligand. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They...
Coinage clusters: A stepwise construction with tetraphosphine ligands (dpmppm) afforded a series of octanuclear coinage rings (see figure); the shape and size vary depending on element M counteranions. The {AuI2AgICuI}2 ring notably incorporates BF4− anion in open pocket surrounded by phenyl groups, even solution. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
A complex with a planar hexagonal Pd(4)Ge(3) core, [Pd{Pd(dmpe)}(3)(μ(3)-GePh(2))(3)], was synthesized and characterized by X-ray NMR measurements as well DFT calculations. 4-tert-Butylbenzenethiol converted the Pd(4) into hexapalladium complex, [{Pd(3)(μ-GePh(2))(2)(μ-H)(μ(3)-GePh(2)(SC(6)H(4)(t)Bu-4))}(2)(μ-dmpe)], composed of two Pd(3)Ge(3) units bridged dmpe ligand. The addition CuI or AgI to yielded [Pd(μ-MI){Pd(dmpe)}(3)(μ(3)-GePh(2))(3) ] (M = Cu, Ag), in which Cu Ag bridges Pd-Pd...
Electron-deficient Pt2M2Pt2 hexanuclear clusters, [Pt4M2(μ-dpmp)4(XylNC)2](PF6)4 (M = Pt (7), Pd (8); dpmp bis((diphenylphosphino)methyl)phenylphosphine), were synthesized by oxidation of hydride-bridged clusters [Pt4M2(μ-H)(μ-dpmp)4(XylNC)2](PF6)3 (2), (3)) and revealed to involve a linearly ordered array joined delocalized bonding interactions with 84 cluster valence electrons, which are discussed on the basis DFT calculations. The central M–M distances 7 8 significantly reduced upon...
Rationally designed topological arrangement of multinuclear transition metal centers is fundamental importance to create diverse functions applicable catalysts, electronic, photochemical, and...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDinuclear Manganese(II) Complexes with the {Mn2(.mu.-carboxylato)2}2+ Core and Their Transformation to (.mu.-Oxo)bis(.mu.-carboxylato)dimanganese(III) ComplexesTomoaki Tanase Stephen J. LippardCite this: Inorg. Chem. 1995, 34, 18, 4682–4690Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August...
A platinum–silylene complex is implicated in the generation of triangular platinum cluster 1 by thermolysis a bis(silyl)-PtII complex. Although contains only electron-releasing ligands, X-ray structural data, NMR studies, and MO calculations on model are consistent with presence Pt0 centers metal–metal bonds.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of mixed-metal sulfido clusters with a cuboidal molybdenum-palladium sulfide (Mo3PdS4) core which coordinate alkene to the unique palladium site surrounded by ligandsTakashi Murata, Hong Gao, Yasushi Mizobe, Fumio Nakano, Shigeyuki Motomura, Tomoaki Tanase, Shigenobu Yano, and Masanobu HidaiCite this: J. Am. Chem. Soc. 1992, 114, 21, 8287–8288Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published...
Linear Pt2M2Pt2 hexanuclear clusters [Pt4M2(μ-H)(μ-dpmp)4(XylNC)2](PF6)3 (M = Pt (2a), Pd (3a); dpmp bis(diphenylphosphinomethyl)phenylphosphine) were synthesized by site-selective reductive coupling of trinuclear building blocks, [Pt2M(μ-dpmp)2(XylNC)2](PF6)2 (1a), (1b)), and revealed as the first example low-oxidation-state metal strings bridged a hydride with M–H–M linear structure. The characteristic intense absorption bands around 583 nm (2a) 674 (3a) assigned to HOMO–LUMO transition on...
A linearly ordered tetraphosphine containing electron-withdrawing substituent groups on the outer phosphorus atoms, meso-bis[{di(3,5-difluorophenyl)phosphinomethyl}phenylphosphino]methane (dpmppmF2), was prepared and reacted with [Pd2(RNC)6](PF6)2 Pd(dba)2 to afford tetranuclear palladium complexes, [Pd4(μ-dpmppmF2)2(RNC)3](PF6)2 (R = 2,6-xylyl (Xyl) (1), 2,4,6-mesityl (2), 2,6-diisopropylphenyl (3) tert-butyl (4)), which involve an asymmetric {(RNC)Pd4(CNR)2}2+ core supported by two...
Reaction of [Pt2(RNC)6](PF6)2 (R = 2,6-xylyl (Xyl) (a) and 2,4,6-mesityl (Mes) (b)) with 2 equiv bis((diphenylphosphino)methyl)phenylphosphine (dpmp) afforded a mixture isomeric diplatinum complexes, syn-[Pt2(μ-dpmp)2(RNC)2](PF6)2 (1) anti-[Pt2(μ-dpmp)2(RNC)2](PF6)2 (2), which were purified by cycles recrystallization characterized X-ray crystallography. Complexes 1 consist core (Pt−Pt 2.7094(8) Å (1a) 2.683(2) (2a)) asymmetrically bridged two dpmp ligands. The central phosphorus atoms the...