Abstract
A novel mono-T-silyl functionalized triphenylphosphine ligand was prepared by a simple coupling reaction of ( p-aminophenyl)diphenylphosphine and 3-triethoxysilylpropylisocyanate. The corresponding carbonylchlorobisphosphinerhodium(I) complex ClRh(CO)[PPh 2C 6H 4NHCONH(CH 2) 3Si(OEt) 3] 2 was synthesized in order to be sol–gel processed with various amounts of different D- and T-silyl bifunctionalized co-condensation agents. The polysiloxane matrices and the active rhodium centers were investigated by means of multinuclear solid state NMR ( 13C, 29Si, 31P) and dynamic NMR measurements. The rhodium containing xerogels were applied in the hydroformylation of 1-hexene. These stationary phases show remarkable catalytic activities independent on the solvent. An enhancement of the activities is achieved when T-silyl bifunctionalized co-condensation agents are used to build up the carrier matrix.
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