Complexes with a Metal-Phosphorus Triple Bond as Versatile Building Blocks in Coordination and Organometallic Chemistry

Abstract

Trapping reactions of the phosphido complex intermediate [Cp*(CO) 2 W ıP →W(CO) 5 ], generated by thermolysis of [Cp*PlcubW(CO) 5 rcub 2 ] 1 , occur via [2 + 2] cycloaddition reactions with P 4 , phosphaalkynes, alkynes, and [CpMo(CO) 2 ] 2 , respectively. However, with nitriles, insertion reactions into the P--C σbond of 1 are observed already at room temperature to give novel P-containing heterocycles. Furthermore, irradiation of 1 gives the tetrahedral complex [Cp*(CO) 6 W 2 rcub( μ-H)( μ, -2 -P 2 )lcubW(CO) 5 rcub 2 ], which indicates that besides the formation of the triple-bond intermediate [Cp*(CO) 2 W ıP →W(CO) 5 ] a second Cp* elimination intermediate of the type [PlcubW(CO) 5 rcub 2 ] occurs.