Leo C. D. Groenweghe

Exchange of substituents between the dimethylsilicon and the dimethylgermanium moieties

Abstract Equilibria in the scrambling between dimethylsilicon and dimethylgermanium of chlorine, bromine, or iodine with either methoxyl or methylthio groups have been studied by proton nuclear magnetic resonance. The scrambling of methoxyl with the methylthio group is also reported. As expected, most of these equilibria deviate greatly from the values corresponding to random sorting of the substituents. The mathematical treatment of the scrambling of two kinds of substituents between two different central moieties (including atoms) is discussed and typical examples are presented for the variation with over-all composition of the six molecular species resulting from such scrambling on a pair of bifunctional moieties.