Some organogermanium oligomers with different side groups were synthesized via li-gand substitution polymerization from 1

4-dioxane complex of germanium dichloride withdifferent organolithitum compounds. The oligomers were isolated through either precipi-tation from methanol or extraction using toluene with a yield of no less than 50%. Theweiglit average molecular weight (Mw) of the oligomers is ranging from 1.4×103 to 5.9×103 depending on the type and alkyl length of the organolithium compounds used.