Mixed-Valent Linear Chain Pt2PdPt2 Complexes

✍ Scribed by Saiko Arai; Masahiko Ochiai; Koji Ishihara; Kazuko Matsumoto

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 202 KB
• Volume: 2007
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200601247

✦ Synopsis

Abstract

Pentanuclear linear‐chain PtPd complexes {[Pt~2~(NH~3~)~2~X~2~(μ‐pivalamidato)~2~(CH~2~COCH~3~)]~2~[PdX′~4~]}·2CH~3~COCH~3~ (X = X′ = Cl (1a), X = Cl, X′ = Br (1b), X = Br, X′ = Cl (1c), X = X′ = Br (1d)) composed of a monomeric Pd^II^ complex sandwiched by two amidato‐bridged dimeric Pt^III^ units were synthesized from the reaction between the acetonyl dinuclear Pt^III^ complexes having equatorial halide ligands [Pt~2~(NH~3~)~2~X~2~(μ‐pivalamidato)~2~(CH~2~COCH~3~)]X″ (X = Cl (2a), Br (2b), X″ = NO~3~^–^, CH~3~C~6~H~4~SO~3~^–^) and K~2~[PdX′~4~] (X′ = Cl, Br). The X‐ray crystallographic analysis of 1a–1d shows that the complexes have metal–metal bonded linear Pt~2~PdPt~2~ structures. The pentanuclear PtPd complexes have either an arch backbone structure or a sigmoid backbone structure, depending on the solvent of crystallization. The UV/Vis/NIR spectra clearly show the existence of a rare charge‐transfer band from Pd to Pt in the pentanuclear PtPd complexes. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)