hydrogen fluoride in tetrahydrofuran byproducts: methanol; (Ar or N2), dry solvents; addn. of excess of HF (40percent) to a soln. of the Ge-compd. in THF, stirring at 30°C (30 min);; extn. (benzene), drying (Na2SO4, 12 h), concn. (reduced pressure), redissolving (THF), drying (Na2SO4, 2 h), concn. (reduced pressure), crystn. (benzene); elem. anal.;;

in benzene byproducts: C6H3(CH3)3; (N2); soln. of Ge-compd. in anhyd. benzene kept at 80°C (12 h);;

in benzene byproducts: HF; standing at 20°C;; (1)H-NMR spectroscopic monitoring;;

in benzene byproducts: C6H2(CH3)3NH2; investigation of thermal decompn. in a sealed tube (18 h, 150-160°C); detected by 1H-NMR and gas chromy.; formation of 43percent (C6H2(CH3)3)2GeF2 and 57percent C6H2(CH3)3NH2;;