25A. Ph3SbCl2-x(OSiH3)x + Me3SnOSiH3 → Ph3SbCl1-x(OSiH3)1+x + SnMe3Cl (where: x = 0-1) respectively. The results show that the reaction is sufficiently spontaneous and irreversible for most precursors, especially those reported to be utilized experimentally, thereby generally supporting the conclusions of Clark, Lee, Barnes, and Styskalik, and the validity of the method of sequential additions.