Syntheses of Selenolato-Bridged Dinuclear Hydridoplatinum Complexes [Pt2H2(μ-SetBu)2(PPh3)2] and [Pt2H(SetBu)(μ-SetBu)2(PPh3)2]: Unusual Thermal Reaction of Hydrido(1,1-Dimethylethaneselenolato) Platinum Complex cis-[PtH(SetBu)(PPh3)2]
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posted on 2010-09-06, 00:00 authored by Norio Nakata, Takashige Ikeda, Akihiko IshiiNovel selenolato-bridged dinuclear hydridoplatinum complexes, cis-[Pt2H2(μ-SetBu)2(PPh3)2] (2) and cis-[Pt2H(SetBu)(μ-SetBu)2(PPh3)2] (3) were synthesized in 30% and 57% yields, respectively, by the thermolysis of hydrido(1,1-dimethylethaneselenolato) Pt(II) complex cis-[PtH(SetBu)(PPh3)2] (1) in toluene at 80 °C for 3 h. The structures of dinuclear complexes 2 and 3 were fully characterized on the basis of their NMR and IR spectroscopic data and X-ray crystallography. The two distorted square planar Pt atoms in 2 and 3 are held together by two bridged selenolato ligands, tBu groups of which adopt a trans configuration with respect to the four-membered Pt2Se2 ring. Each central Pt2Se2 ring in 2 and 3 has a hinged arrangement due to the steric repulsion among the two PPh3 ligands and the tBu group lying between them.
