Tin(IV) halide promoted vinyl rearrangement of hexafluorobuta-1,3-diene–platinum complexes
Abstract
The major products of reactions of stilbenebis(triphenylphosphine)platinum or tetrakis(triphenylarsine)platinum with hexafluorobuta-1,3-diene are complexes in which one double bond of the diene is co-ordinated to the metal, viz. [graphic omitted]·CF:CF2(L2)[L = PPh3 or AsPh3]. The arsenic compound reacts with diphenylmethylphosphine to give [graphic omitted]·CF:CF2(PPh2Me)2. Reactions of these hexafluorobutadiene complexes with stannic chloride or bromide in benzene afford the complexes trans-Pt(X)(CF:CFCF:CF2)L2(X = Cl; L = PPh3, PPh2Me, AsPh3; X = Br; L = PPh3, PPh2Me). The 19F n.m.r. spectra of the new compounds are described, and the mechanistic implication of the stereochemistry of the products discussed.