Rational synthesis of dinuclear complexes of platinum(I) and platinum(II) containing bridging ortho-metallated triphenylphosphine ligands from the monomeric bis(chelate) platinum(II) complex Pt(o-C6H4PPh2)2

Abstract

Comproportionation of Pt(PPh₃)₃ and the bis(chelate) complex Pt(o-C₆H₄PPh₂)₂ gives a dinuclear complex Pt₂(µ-o-C₆H₄PPh₂)₂(PPh ₃)₂ which is shown by X-ray crystallography to contain two ortho-metallated triphenylphosphine ligands bridging a Pt^I–Pt^I bond [Pt–Pt 2.630(1)Å]; addition of iodine gives a salt [Pt₂(µ-l)(µ-o-C₆H₄PPh₂)₂(PPh₃)₂]l, the cation of which has an A-frame structure [Pt–Pt 2.931(2)Å].