Abstract: The title compound was synthesized with the view of finding anticancer agents since organogermanium have been reported to have such actions. Tts structure and properties were determined and examined by elemental analysis, IR spectrum, FAB-MS and TG-DTA. The IR spectrum showed the characteristic absorption band of Ge-O bonds at 800～900 cm^-1,indicating the formation of organogermanium sesquioxide. Under fast acom bombardment, the Ge-O-Ge-O network was split, the fragments with R-Ge could combine with 3-mercapto-1,2-propanediol or glycerin easily, forming the new compounds of R-Ge-O-CH and R-Ge-O-CH type. When heated in air, the compound decomposed in three steps, the possible mechanism of thermal decomposition was discussed. The biological activity of the compound is to be determined.