Polysilaanthracene synthesis

A new class of polycarbosilane derivatives was synthesized in good yields through the coupling reaction of dichlorodihydrodisilaanthracene with chlorosilanes using sodium dispersion. The dihydroanthracene derivative was obtained from the organodimetallic anthracene coupling reaction with methyl(H)-, methylphenyl- and dimethyl-chlorosilanes. This process has two main stages determined from the content of the sodium derivative in the reaction mixture, high molecular weight products being formed even at room temperature. The intermediates which contained Si–H groups lead finally to functional polysiladihydroanthracenes. The structure of the resulting polymers was investigated using IR, 1H-NMR, 13C-NMR and SEC analyses.