Dendritic and cross-linked polyphenylenepolygermanes have been obtaine
d by reactions of EtMgBr with (C6F5)(3)GeH and (C6F5)(2)GeH2, respecti
vely. The reaction of sodium naphthalenide with trihydride C6F5GeH3 gi
ves linear insoluble polymer (C6F4GeH2)(n).