in neat (no solvent) byproducts: Me3SiOSiMe3; mixt. of Si compd. and Bu3SnOSnBu3 (molar ratio 2:1) heated at 160-180°C (oil bath) for 0.5 h; according to N. A. Boldyreva, N. V. Komarov, A. A. Andreev, J. Gen. Chem. USSR, 1988, 58; isolated by vac. distn.; elem. anal.;