Organoplatinum(II) Complexes Featuring the 2-Vinylpyridine Ligand

摘要

Room temperature reaction of 2-vinylpyridine ligand (L, 2 equiv.) with the known dimethylplatinum(II) complex cis,cis- [Me2Pt(μ-SMe2)2PtMe2], A, provided a novel dimeric platinum(II) complex [PtMe2(μ~2-η~1:η2-2-vpy)]2, 2, by displacement of the dimethyl sulfide (SMe2) ligands with the nitrogen atom and the olefinic double bond donors of 2-vpy. The single crystal structure of complex 2 reveals a distorted square-planar geometry around platinum centers. Two L groups in this complex act as bridging ligands between platinum centers, displaying a short Pt···Pt interaction with unique orientation in a head-to-tail (HT) arrangement. Complex 2 was not stable in dimethyl sulfoxide (dmso) solution, and through C-H bond activation produced methane and cyclometalated complex [PtMe(η~1:η~1-2-vpy)(dmso)], 1.