An amido-bridged platinum olefin dimer. The synthesis, characterisation, and X-ray structure analysis of bis{chlorot-µ-[1′–2′-η-o-isopropenylphenyl(methyl)amido-C1′–2′,N;µ-N]platinum(II)}

Abstract

The amido-bridged dimeric molecule [{[graphic omitted]CH₂)}₂](1) was prepared by deprotonation of the amino-complex [PtCl₂(NHMeC₆H₄CMeCH₂)] using an anion-exchange resin in the hydroxide form in tetrahydrofuran. The molecular structure of compound (1) was established using i.r., ¹H n.m.r., and ¹³C n.m.r. spectroscopy and X-ray analysis. The organic ligand is bidentate, co-ordinated through the olefin group and the amido-nitrogen atom. The dimer has crystallographic C₂ symmetry and is folded about the bridging nitrogen atoms giving a Pt–Pt distance of 2.980(2)Å. Crystals of (1) are orthorhombic, space group Fdd2, with unit-cell dimensions, a= 9.892(2), b= 19.488(3), c= 21.679(4)Å, and Z= 8. Full-matrix refinement using 703 diffractometer data with I/σ(I) > 3.0 has converged at R= 0.046.