(C2H5)3N in toluene byproducts: (C2H5)3NHCl; slow dropwise addn. of (C6H5)4Ge2Cl2 (in toluene) to soln. of (HO)2Ge(C(CH3)3)2 and N(C2H5)3 in toluene; stirring (room temp./1-2 h);; filtration from (C2H5)3NHCl; concn.; recrystn. (petroleum ether); removal of (C6H5)8Ge4O2 by fractionated crystn.; elem. anal.;;

H2O in acetone heating of oxide in H2O/acetone mixt.;

in xylene slow addn. of aq. NaOH to soln. of chloride, reflux, 3h, sepn. of phases, organic phases concd. up, pptn.; recrystn. from CHCl3; elem. anal.;

in ethanol treatment of soln. of tBu2Ge(OEt)2 in EtOH with water, heating for 15 hat 40°C; evapn. in vac., recrystn. of tBu2Ge(OH)2 from CHCl3 at -10°C, size-exclusion chromy. (Sephadex-G20, CH2Cl2) of (tBu2GeOH)2O; elem. anal.;

in ethanol treatment of soln. of tBu2Ge(OEt)2 in EtOH with large excess of water, heating for 15 h at 40°C; evapn. in vac., recrystn. from CHCl3 at -10°C; elem. anal.;

in xylene addn. of dried molecular sieve (3-5Å) to soln. of educt, reflux, 5h, filtered, solvent removed; recrystn. from CHCl3; elem. anal.;