Faculty Profiles - SUZUKI Takayoshi

Papers - SUZUKI Takayoshi

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DRASTIC STRUCTURAL-CHANGE IN SILVER(I) COMPLEXES WITH ALTERATION OF THE OPTICAL-ACTIVITY OF A PYRIDINE DERIVATIVE LIGAND - HELICAL ARRAYS WITH EXTENDED STRUCTURE AND AN OPTICALLY INACTIVE DINUCLEAR COMPLEX

Suzuki, T., Kotsuki, H., Isobe, K., Moriya, N., Nakagawa, Y., Ochi, M.

Inorganic Chemistry 34 ( 3 ) 1995

SYNTHESIS, CRYSTAL-STRUCTURES AND SPECTROSCOPIC PROPERTIES OF CIS- RHCL(2)L(2) (+) L=1,3-BIS(DIMETHYLPHOSPHINO)PROPANE AND TRANS- RHCL(2)L(2) (+) L=1,3-BIS(DIMETHYLPHOSPHINO)PROPANE OR 1,2-BIS(DIMETHYLPHOSPHINO)ETHANE (DMPE) - REINVESTIGATION OF THE DMPE COMPLEXES

Suzuki, T., Isobe, K., Kashiwabara, K.

Journal of the Chemical Society-Dalton Transactions ( 22 ) 1995

A HETEROTRIMETALLIC SULFIDE CLUSTER HAVING A LINEAR RH(III)...W(VI)...CU(I) FRAMEWORK OF AN OCTAHEDRAL-TETRAHEDRAL-TRIGONAL PLANAR SEQUENCE Reviewed

S OGO, T SUZUKI, Y OZAWA, K ISOBE

CHEMISTRY LETTERS 23 ( 7 ) 1235 - 1238 1994.7

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

A heterotrimetallic sulfide cluster with an organometallic group, [Cp*Rh{P(OEt)(3)}(mu-S)(2)W(mu-S)2CuCl] (Cp*=eta(5)-C(5)Me(5)), was prepared stepwise by using mononuclear units of organorhodium(III), thiotungstate(VI), and chlorocopper(I). X-ray crystal structure analysis revealed that the cluster possesses a linear sequence of middle (Rh), early (W), and late (Cu) transition metal atoms with octahedral, tetrahedral, and trigonal planar coordination geometries, respectively.

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SYNTHESIS AND CRYSTAL-STRUCTURE OF (IRCP-ASTERISK)2(MU-OH)3 2(CR2O7)CENTER-DOT-8H2O (CP-ASTERISK=ETA-5-C5ME5) - A NOVEL 2-DIMENSIONAL HYDROGEN-BONDING NETWORK

Park, J. T., Nishioka, T., Suzuki, T., Isobe, K.

Bulletin of the Chemical Society of Japan 67 ( 7 ) 1968 - 1971 1994

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

The title complex, prepared from a reaction of [(IrCp^*Cl)₂(μ-Cl)₂] with K₂CrO₄ in water, has been characterized via a single-crystal X-ray diffraction study. In the solid state the tri-μ-hydroxo-diiridium complex cations, the dichromates having the staggered conformation, and the water molecules of crystallization are entirely connected by hydrogen bonds forming a novel two-dimensional layer structure.

DOI： 10.1246/bcsj.67.1968

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PREPARATION AND CHARACTERIZATION OF IRIDIUM(III) COMPLEXES CONTAINING (2-AMINOETHYL)DIMETHYLPHOSPHINE (EDMP) OR (2-AMINOETHYL)DIPHENYLPHOSPHINE (EDPP) - STRUCTURES OF FAC- IR(EDMP)3 CL3-CENTER-DOT-5H2O AND TRANS(CL,CL),CIS(P,P)- IRCL2(EDPP)2 BF4 AND COMPARISONS OF THEIR PROPERTIES WITH THOSE OF THE COBALT(III) AND RHODIUM(III) ANALOGS

Suzuki, T., Rude, M., Simonsen, K. P., Morooka, M., Tanaka, H., Ohba, S., Galsbol, F., Fujita, J.

Bulletin of the Chemical Society of Japan 67 ( 4 ) 1013 - 1023 1994

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

The iridium(III) complexes containing (2-aminoethyl)dimethylphosphine (edmp) or (2-aminoethyl)diphenylphosphine (edpp) were prepared. Crystal structures of fac-[Ir(edmp)₃]Cl₃·5H₂O (2), trans(Cl,Cl),cis(P,P)-[IrCl₂(edpp)₂]BF₄ (3), and Δ(lel₃)- and Λ(ob₃)-[Ir(R,R-chxn)₃](NO₃)₃·3H₂O (4 and 5; chxn = trans-1,2-cyclohexanediamine) were determined by single-crystal X-ray diffraction. Crystal data and final R values are: for 2, FW = 703.7, triclinic, _{</SUB>, a = 11.718(2), b = 13.199(1), c = 9.482(1) Å, α = 91.44(1), β = 105.86(1), γ = 90.53(1)°, V = 1410.0(2) Å³, D_x = 1.66 Mg m⁻³, and Z = 2, R = 0.039 for 5410 reflections. For 3, FW = 808.5, triclinic, , a = 11.465(1), b = 13.694(1), c = 10.049(1) Å, α = 94.764(6), β = 92.197(8), γ = 102.807(8)°, V = 1530.5(2) Å³, D_x = 1.75 Mg m⁻³, and Z = 2, R = 0.035 for 5978 reflections. For 4, FW = 774.9, hexagonal, P6₃, a = 13.005(1), c = 10.221(2) Å, V = 1497.1(3) Å³, D_m = 1.71(2), D_x = 1.72 Mg m⁻³, and Z = 2, R = 0.020 for 1063 reflections. For 5, hexagonal, FW = 774.9, P6₃, a = 13.359(1), c = 9.848(2) Å, V = 1522.0(3) Å³, D_m = 1.70(2), D_x = 1.69Mg m⁻³, and Z = 2, R = 0.015 for 1105 reflections. The average Ir–N bond length of 2.167(6) Å in 2 is longer by 0.077(6) Å than those in 4 and 5. The structural data of the corresponding cobalt(III) and rhodium(III) complexes show that the order of the strength of the trans influence of the –PMe₂ group in edmp is Co^III < Ir^III < Rh^III. In 3, the elongation of the metal–nitrogen bond length by the trans influence of the –PPh₂ group in edpp is smaller than that of the –PMe₂ group in 2, and the elongation is nearly the same as those in the corresponding cobalt(III) and rhodium(III) complexes. The absorption spectra of the two series of complexes, fac-[M(edmp)₃]³⁺ and trans(Cl,Cl),cis(P,P)-[MCl₂(edpp)<sub>2}]⁺ (M = Co^III, Rh^III, and Ir^III) are compared and Shimura's spectrochemical parameters for iridium(III) are discussed.

DOI： 10.1246/bcsj.67.1013

MOLECULAR-STRUCTURES OF HT- MM'CL2(MU-ME2PPY)2 (MM'=PD2, PDPT, AND PT2 - ME2PPY=2-(DIMETHYLPHOSPHINO)PYRIDINE) AND HT- PD2CL2(MU-PH2PPY)2 (PH2PPY=2-(DIPHENYLPHOSPHINO)PYRIDINE)

Suzuki, T., Iitaka, N., Kurachi, S., Kita, M., Kashiwabara, K., Ohba, S., Fujita, J.

Bulletin of the Chemical Society of Japan 65 ( 7 ) 1817 - 1824 1992

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

Crystal structures of Pd(I) and Pt(I) dinuclear complexes, [MM′Cl₂(μ-Me₂Ppy)₂] (MM′ = Pd₂ (1), PdPt (2), and Pt₂ (3)) and [Pd₂Cl₂(μ-Ph₂Ppy)₂] (4), were determined by the single crystal X-ray diffraction method. Crystal data and final R values are: 1, triclinic, _{</SUB>, a = 10.019(2), b = 10.902(2), c = 9.062(1) Å, α = 97.75(2), β = 102.45(2), γ = 82.64(2)°, V = 952.7(3) Å³, Z = 2, and R = 0.047; 2, monoclinic, P2₁/n, a = 16.532(2), b = 19.205(3), c = 13.260(2) Å, β = 93.86(2)°, V = 4200(1) Å³, Z = 8, and R = 0.043; 3, monoclinic, P2₁/n, a = 16.515(5), b = 19.095(10), c = 13.233(4) Å, β = 93.15(3)°, V = 4167(3) Å³, Z = 8, and R = 0.047; 4, monoclinic, C2/c, a = 30.505(4), b = 17.896(2), c = 12.983(1) Å, β = 98.52(1)°, V = 7009(1) Å³, Z = 8, and R = 0.041. All of the complexes were found to be the head-to-tail isomer of a side-by-side type dinuclear structure. The metal–metal bond distances of 2.584(1) Å in 1, 2.561(1) Å in 2, 2.573(1) Å in 3, and 2.594(1) Å in 4 are relatively short compared with those in the analogous dinuclear complexes bridged by diphosphine ligands. All of the M–P, M–N, and M–Cl distances in Me₂Ppy complexes become shortened in the order of the Pd₂ > PdPt > Pt<SUB>2} complexes.

DOI： 10.1246/bcsj.65.1817

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PREPARATION AND CHARACTERIZATION OF PALLADIUM(I) AND PLATINUM(I) DINUCLEAR COMPLEXES BRIDGED BY 2-(DIMETHYLPHOSPHINO)PYRIDINE

Suzuki, T., Fujita, J.

Bulletin of the Chemical Society of Japan 65 ( 4 ) 1992

A NEW PALLADIUM(I) DINUCLEAR COMPLEX-FORMING A COPLANAR STRUCTURE FOR 2 COORDINATION PLANES

Suzuki, T., Fujita, J.

Chemistry Letters ( 6 ) 1992

SYNTHESIS AND CHARACTERIZATION OF PALLADIUM(II) AND PLATINUM(II) COMPLEXES CONTAINING MONODENTATE PHOSPHORUS DONATING OR CHELATING 2-(DIMETHYLPHOSPHINO)PYRIDINE (PME2PY)

Suzuki, T., Kita, M., Kashiwabara, K., Fujita, J.

Bulletin of the Chemical Society of Japan 63 ( 12 ) 3434 - 3442 1990

Language：English Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan

The complexes [MX₂(PMe₂py-P)₂] (M=Pd(II), Pt(II); X=Cl, Br, and I) have been synthesized and characterized both in the solid state and in solution by their infrared and ¹H, ¹³C, and ³¹P NMR spectra, in addition to an X-ray crystallographic analysis of cis-[PdCl₂(PMe₂py-P)₂]. The latter complex exists as a cis–trans equilibrium mixture in solution, while only the cis isomer has been isolated in the solid state. The [PdBr₂(PMe₂py-P)₂] complex which has been isolated as the trans isomer shows also the same isomerization in solution, in contrast to [PdBr₂(PMe₂Ph)₂] which exists only as the trans isomer both in the solid state and in solution. Furthermore, PMe₂py has been found to have the ability for chelation via the nitrogen and phosphorus atoms to make a four-membered chelate ring. The chelate ring in the complexes [PdX(PMe₂py)₂]Y (X=Cl, Br, and I; Y=ClO₄⁻, PF₆⁻) has been confirmed by infrared spectra and X-ray analysis of cis(P,P)-[PdCl(PMe₂py-P,N)(PMe₂py-P)]ClO₄. This is the first example in which PMe₂py is acting as a chelating ligand.

DOI： 10.1246/bcsj.63.3434

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