Supported organometallic complexes: Part XXIII. A general synthetic route for the synthesis of mono-T-silyl functionalized aromatic phosphines as ligands for chemistry in interphases

The triphenylphosphine ligand (C6H5)2PC6H4(CH2)4Si(OCH3)35(T0) being provided with a T-silyl functionalized (CH2)4 spacer in para-position of only one aryl ring is obtained by a simple four-step reaction starting with p-bromobutenylbenzene 1. 1 is hydrosilylated with HSiCl3 to the silyl species 2 in which the chlorine atoms are exchanged by Oi-Pr groups to give 3(T0). P–C coupling of 3(T0) with Ph2PCl is achieved with a Grignard reaction. Finally the Oi-Pr functions in the resulting phosphine 4(T0) are replaced by OMe substituents with methanol in the presence of CH3C6H4SO3H. Treatment of the modified phosphine 5(T0) with [μ-ClRh(CO)2]2 gave the T-silyl functionalized rhodium(I) complex 6(T0) which is a suitable precursor for sol–gel processing.