Formation and X-ray crystal structure of an A-frame µ-methylene diplatinum complex containing bridging cyclometallated 1,2-bis(diphenylphosphino)ethane

Abstract

The 1 : 1 adduct of the Pt^I–Pt^I dimer [Pt-µ-{o-C₆H₄P(Ph)CH₂ CH₂PPh₂}]₂ with methyl iodide is deprotonated by sodium methoxide to give a µ-methylenediplatinum(II) complex [Pt₂-µ-{o-C₆H₄P(Ph)CH₂CH₂PPh₂}₂(µ-CH₂)], characterised by single-crystal X-ray structural analysis; the latter complex reacts with [Me₃O]PF₆ to give an ethyldiplatinum(II) cation which retains the bridging cyclometallated dppe ligands.