Reactions of GeBr 4 with N,N dimethyl 2 trimethylsiloxypropionamide (2a), (S) 2 trime thylsiloxypropionpyrrolidide ((S) 2b), and N,N dimethyl O (trimethylsilyl)mandelamide (2c) afforded pentacoordinated neutral (O,O) monochelates, viz., N,N dimethyl 2 tribromoger myloxypropionamide (3a), (S) 2 tribromogermyloxypropionpyrrolidide ((S) 3b), and N,N di methyl O (tribromogermyl)mandelamide (3c), respectively. X ray diffraction study was per formed for tribromides 3a, (S) 3b, and 3c, as well as for the N,N dimethylmandelamide (1c) described earlier. According to the X ray diffraction data, the Ge atom in tribromides 3a, (S) 3b, and 3c is pentacoordinated and has trigonal bipyramidal configuration with two halo gen atoms and oxygen atom of the ether group in the equatorial positions and the halogen atom and the amide oxygen atom in the axial fragment, the bonds in which are somewhat longer as compared to the analogous bonds in tetracoordinated Ge compounds.