in tetrachloromethane byproducts: hexachloroethane; Irradiation (UV/VIS); irradn. of (C6H4GeMe2)2 for 1 h with 450-W high-pressure Hg arc lamp inCCl4;

in benzene Irradiation (UV/VIS); irradn. of (C6H4GeMe2)2 for 50 h with 10-W low-pressure Hg arc lamp in presence of excess CH2CMeCMeCH2 in C6H6; elem. anal.;