in hexane under Ar; soln. of Me2GaH in n-hexane added to soln. of C6H3(C2CMe3)3 inn-hexane; heated under reflux for 16 h;

in hexane under Ar; soln. of (n-Pr)2GaH (5percent excess) in n-hexane added to soln. of C6H3(C2CMe3)3 in n-hexane at room temp.; heated under reflux for 16 h; filtered; filtrate concd. under vac. at room temp.; ppt. collected;

in hexane under Ar; soln. of Et2GaH in n-hexane added to soln. of C6H3(C2CMe3)3 inn-hexane at room temp.; heated under reflux for 16 h; filtered; filtrate concd. under vac. at room temp.; ppt. collected;

in hexane under Ar; soln. of (t-Bu)2GaH in n-hexane added to soln. of C6H3(C2CMe3)3 in n-hexane at room temp.; heated under reflux for 16 h; filtered; filtrate concd. under vac. at room temp.; ppt. collected; recrystd.;

in hexane under Ar; soln. of (i-Pr)2GaH in n-hexane added to soln. of C6H3(C2CMe3)3 in n-hexane at room temp.; heated under reflux for 16 h; filtered; filtrate concd. under vac. at room temp.; ppt. collected;