We have previously investigated the synthesis of compounds containing neopentyl group analogs, Me&IVCH2-, where MIv is a Group IV-B element, as well as the chemical consequences of introducing such groups into organosilicon compounds. l In order to obtain more information on the inductive and steric effects of the neopentyl group analogs as the quaternary atom is varied from C to Si to Ge to Sn, we are commencing a study of the ...