hydrogen bromide in water; benzene addn. of a soln. of acid in H2O to a soln. of germane in benzene (N2), stirring for 2 h at 60°C; extn. with pentane, drying over Na2SO4, evapn. (reduced pressure), recrystn. in pentane; elem. anal.;

ammonium hydroxide in tetrahydrofuran N2 or Ar; aq. NH4OH addn. dropwise to Ge-compd. soln. (THF), stirring 30min at 20°C, org. phase sepn. from. aq. phase, aq. phase extn. t wice with benzene, drying (Na2SO4), HBr addn. at 5°C, org. phase recuperationm drying (Na2SO4); solvent evapn. to dryness, recrystn. (pentane);