FUNCTIONALIZATION AND CROSS-LINKING REACT IONS ON ORGANOSILICON POLYMERS

Novel poly(silylenealkynes), poly(silylenemethylenes), and poly(silyle nephenylenes) with a regular alternating structure in the polymer back bone have been prepared by reductive coupling of special substituted s ilyl triflates or chlorides with potassium-graphite or by ring-opening polymerization of 1,3-disilacyclobutanes. The functionalization of th ese polymers with trifluoromethanesulfonic acid and following reaction s with grignard reagents, amines, or lithium tetrahydridoaluminate gav e novel polymeric derivatives. The protodesilylation reaction could be controlled by using different leaving groups (phenyl-, p-tolyl-, or p -anisyl-groups). in this way, the regular structure of the polymer bac kbone could be kept during the funtionalization reactions. Novel netwo rk-polymers have been obtained by intermolecular hydrosilylation react ions of the modified polymer derivatives. The polymers were characteri zed by NMR spectroscopy (Si-29, C-13, H-1).