Optically Active S-Bridged CoIIIPdII Polynuclear Complexes Derived from ΔΔ-[Ni{Co(aet)2(R-pn)}2]4+(aet = 2-Aminoethanethiolate, R-pn = (R)-1,2-Propanediamine)

Yasunori Yamada, Yoko Maeda, Takumi Konno, Kiyoshi Fujisawa, Ken-ichi Okamoto

doi:10.1246/bcsj.73.1831

<jats:title>Abstract</jats:title> <jats:p>The substitution reaction of ΔΔ-[Ni{Co(aet)2(R-pn)}2]4+ with equimolar Na2[PdCl4] in water gave selectively an optically active trinuclear complex, ΔΔ-[Pd{Co(aet)2(R-pn)}2]4+ (1). On the other hand, an optically active dinuclear complex, Δ-[PdCl2{Co(aet)2(R-pn)}]+ (2), was also obtained by a two-molar equivalent addition of Na2[PdCl4] under the same reaction condition. Similarly, the reaction of ΔΔ-[Ni{Co(aet)2(R-pn)}2]4+ with two molar equivalent [Pd(NO3)2(bpy)] produced an optically active dinuclear complex, Δ-[Pd(bpy){Co(aet)2(R-pn)}]3+ (3). The crystal structures of complexes 1, 2, and 3 were determined by X-ray crystallography. Each of the Co atoms in 1, 2, and 3 is coordinated by two aet and one R-pn ligands to take an approximately octahedral geometry. The Pd atom in 1 is coordinated by four S atoms from two cis(S)-[Co(aet)2(R-pn)]+ units. The Pd atom in 2 is ligated by two S atoms from one cis(S)-[Co(aet)2(R-pn)]+ unit and two Cl atoms, while the Pd atom in 3 is coordinated by two S atoms from one cis(S)-[Co(aet)2(R-pn)]+ unit and two N atoms in bpy. All of the Pd atoms in 1, 2, and 3 take an almost square-planar geometry. These complexes are also characterized on the basis of the electronic absorption, CD, and 13C NMR spectra. The interconversions of the trinuclear and dinuclear complexes obtained in this work are discussed.</jats:p>

Optically Active S-Bridged CoIIIPdII Polynuclear Complexes Derived from <i>ΔΔ</i>-[Ni{Co(aet)2(<i>R</i>-pn)}2]4+(aet = 2-Aminoethanethiolate, <i>R</i>-pn = (<i>R</i>)-1,2-Propanediamine)

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収録刊行物

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