Complexes of the type trans-[PtCl 2(PR 3)(CNR′) and the carbene complex trans-[PtCl 2(PR 3){C(NHC 6H 4Me-4) 2}

Abstract

Treatment of chloro-bridged complexes of type [Pt 2Cl 4(PR 3) 2] with isonitriles at low temperatures gives complexes of type trans-[PtCl 2(PR 3)(CNR′)], which can be isolated. Previously only the corresponding cis-complexes have been described. Addition of two mole equivalents of CNC 6H 4Me4 to [Pt 2I 4(PBu t 2Pr n) 2] in dichloromethane at −78 °C gives the salt cis-[PtI(PBu t 2Pr n)(CNC 6H 4Me4) 2]I. Treatment of trans-[PtCl 2(PBu t 2Pr n)(CNC 6H 4Me4)] with p-toluidine gives the carbene complex trans-[PtCl 2(PBu t 2Pr n){C(NHC 6H 4Me4) 2}], the first example of a trans-carbene complex of this type.