Rhodium, palladium, and platinum complexes formed from 2,2,4-trimethylpent-3-en-1-ol

Abstract

2,2,4-Trimethylpent-3-en-1-ol (Me₂C:CH·CMe₂·CH₂·OH) reacts with palladium(II) chloride to give π-enyl complexes, i.e.{[(CH₂·CMe·CH)·CMe₂·CH₂·OAc]PdCl}₂ in aqueous acetic acid and {[(CH₂·CMe·CH)·CMe₂·CH₂·OH]PdCl}₂ in dimethylformamide. No interaction between the palladium and acetate or hydroxy-functions is observed. Reaction with [Rh(CO)₂Cl]₂ in benzene gives the olefin complex [(Me₂C:CH·CMe₂·CH₂·OH)Rh(CO)Cl]₂ in which the hydroxy-function is also co-ordinated to the metal. With platinum(II) chloride in dimethylformamide the alcohol yields an olefin complex [Me₂C:CH·CMe₂·CH₂·O·PtCl]₂ which contains a Pt–O covalent bond. N.m.r. and i.r. data are given to support the structures proposed.