9, 10-Dicyanoanth racene-sen sitized irradiation of 7, 8-di silabicyclo [2.2. 2] octa-2, 5- dienes 1–3 in the presence of MeOH resulted in the formation of dimethoxydisilanes and the corresponding aromatic compounds. A stepwise mechanism involving C Si bond cleavage by MeOH is proposed.