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 L P M W(CO) 5 ], generated by thermolysis of [Cp*P{W(CO) 5 } 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 bond 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 }( w -H)( w , m 2 -P 2 ){W(CO) 5 } 2 ], which indicates that besides the formation of the triple-bond intermediate [Cp*(CO) 2 W L P M W(CO) 5 ] a second Cp* elimination intermediate of the type [P{W(CO) 5 } 2 ] occurs.

Keywords:

• Cyloadditions
• Insertion Reactions
• Multiple Bonds
• P Ligands