Abstract
Phenylhalogermylenes (phGeX) (X = Cl, Br) insert into the germanium-halogen bond of various phenylhalogermanes to lead to phenylhalopolygermanes. The stability and the mode of decomposition of these compounds have been studied. The insertion of phenylchlorogermylene into tetrahalogermanes GeX4 (X = Cl, Br, I) leads to unstable phenylpentahalodigermanes which are a source of dihalogermylene GeX2