Pentafluorophenylplatinum complexes containing η1- or η2-aryl–Pt interactions. Crystal structure of cis-[Pt(C6F5)2-({NC5H4[CH(η2-Ph)Ph]-2}-κN)]·0.5C6H5Me

Abstract

The reaction of cis-[Pt(C₆F₅)₂(thf)₂]1(thf = tetrahydrofuran) with a 1 : 1 molar ratio of 2-(diphenylmethyl)pyridine or tribenzylamine in CH₂Cl₂ resulted in displacement of the thf molecules and formation of cis-[Pt(C₆F₅)₂{NC₅H₄(CHPh₂)-2}]2 and cis-[Pt(C₆F₅)₂{N(CH₂Ph)₃}]3 respectively. The solid-state structure of 2 has been established by X-ray diffraction methods and reveals the existence of a η²-phenyl–Pt interaction which is maintained in solution (NMR). Crystal data for 2·0.5C₆H₅Me: C_33.5H₁₉F₁₀NPt, triclinic, space group P, a= 11.653(4), b= 12.345(3), c= 12.499(4)Å, α= 116.91(2), β= 104.33(2), γ= 103.41(2)°, Z= 2, R= 0.038 for 2791 unique ‘observed’ absorption-corrected reflections collected at 233 K. Complexes 2 and 3 reacted with CO yielding cis-[Pt(C₆F₅)₂{NC₅H₄(CHPh₂)-2}(CO)] and cis-[Pt(C₆F₅)₂{N(CH₂Ph)₃}(CO)] respectively.