Novel Aspects in Metal Phosphorus Double Bond Chemistry: Simple Access to P-Arylated, P-Alkylated and Chiral Derivatives and their Conversion to Three Membered Metallacycles

Abstract

Complexes CP(CO)₂M=PR₂ (M = Cr, Mo, W) with a metal phosphorus double bond can be prepared either via decarbonylation of the metallo-phosphanes CP(CO)₃M-PR₂ or dehydrdchlorination of the bifunctional complexes Cp(C0)₂(R₂PX)M-Y (X = C1, H, NMe₂; Y = H, C1) respectively. These procedures are complementary and allow the introduction of diverse substituents at the phosphorus (R = alkyl, aryl, alkoxy, dialkylamino) as well as the synthesis of species Cp(C0) (Me₃P)M=PR₂ with a chiral metal centre. The high reactivity of the M=P-complexes offers easy access to diverse three membered metallaand dimetallacycles.