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Successive Formation of Hydrido(germyl)platinum, Germaplatinacycle, and Germylene-Bridged Dinuclear Platinum Complexes from the Reaction of a Zerovalent Platinum Complex with α,ω-Dihydrodigermanes

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posted on 29.08.2005, 00:00 by Yoko Usui, Sayaka Hosotani, Aki Ogawa, Masato Nanjo, Kunio Mochida
The reaction of Pt(η2-C2H4)(PPh3)2 (1) with HPh2Ge(SiMe2)nGePh2H (2; n = 0−3) initially forms the hydrido(germyl)platinum complex cis-Pt(H)[GePh2(SiMe2)nGePh2H](PPh3)2 (3), followed by the generation of the cyclic bis(germyl)platinum complex (4) and finally formation of a dinuclear platinum complex with bridging diphenylgermyl ligands containing a Pt−Pt bond, [Pt(μ-GePh2)(PPh3)]2 (5). The structures of 4 (n = 2) and 5 were determined by X-ray crystallography.