Platinum(0)–[60]fullerene complexes with chelating diphosphine ligands. Syntheses and characterisation of [Pt(η2-C60)(L–L)] [L–L = Ph2P(CH2) nPPh2, n = 2 or 3]

Abstract

Reaction of [60]fullerene with [Pt(cod) ₂ ] (cod = cycloocta-1,5-diene) resulted in facile displacement of the cod ligand to form black-brown insoluble PtC ₆₀ . The reaction of a tetrahydrofuran suspension of PtC ₆₀ with bidentate diphosphines L–L = Ph ₂ P(CH ₂ ) _n PPh ₂ (n = 2 or 3) gave rise to cleavage of the carbon–platinum bond and formation of the [Pt(η ² -C ₆₀ )(L–L)] complexes, which were characterised spectroscopically. The latter complexes can also be readily prepared in a one-pot synthesis by slowly adding an equimolar amount of [Pt(cod) ₂ ] to a solution of [60]fullerene and the corresponding diphosphine in toluene.