aluminum triiodide in benzene addn. of AlI3 catalyst to a soln. of the aryldisilane, passing HI through the soln. until heat development has finished; removal of the solvent, distn. in vacuo or recrystn. of the residue;

in neat (no solvent) byproducts: C10H8; condensation of HBr onto disilane; cooling 12h at -70°C; condensing off HBr and C10H8; elem. anal.;