Formation of an unusual tetralithium diplatinum complex [Pt(C≡CBut)2(PPh2O)2Li 2(μ-H2O)(Me2CO)2]2 containing μ3-PPh2O- ligands

Abstract

The very unusual complex [Pt(C[triple bond, length half m-dash]CBut)2(PPh2O)2Li2(µ-H2O)(Me2CO)2]2 2 is obtained by the reaction of ‘Li2[Pt(C[triple bond, length half m-dash]CBut)4]’ with an excess of PPh2H in acetone–ethanol and possesses an unusual linear chain of four Li atoms sandwiched between two square planar dianionic units trans-–OPPh2{Pt(C[triple bond, length half m-dash]CBut)2}PPh2O–, to which it is bound through µ3-PPh2O– bridging ligands.