Polymer supported ferrocene derivatives. Catalytic hydrosilylation of olefins by supported palladium and platinum complexes

Abstract

Platinum and palladium derivatives of polymers functionalized with the ferrocene derivatives 1-ferrocenylethyldimethylamine ( 3), 1,1′-bis(diphenylphosphino)ferrocene ( 4), N, N-dimethyl-1-(2-diphenylphosphinoferrocenyl]ethylamine ( 5), and ( S, R)- 5 are effective catalysts for the hydrosilation of olefins such as styrene and 1-hexene by trichlorosilane. They can be recycled with no loss of activity. The palladium derivatives catalyze stereoselective α-addition to styrene and the optical yield using ( S, R)- 5 is 15.2%. The stereoselectivity remains the same but the optical yield drops on recycling. All other reactions studied result in addition to the terminal carbon atom of the olefin. The absence of ligand effects indicates that the platinum derivatives are reduced to catalytically active metal. The method used for the binding of chiral 5 to the polymer probably results in the induction of chirality at the linking carbon atom, polymer * CHOH(ferrocene derivative.