in tetrahydrofuran byproducts: LiCl; all manipulations under dry, O2-free N2, or under vac., or in a vac. dry box under Ar; addn. of phosphide soln. to GaCl3 soln., -78°C, allowed to warm slowly, stirred, room temp.; evapn. (vac.), extn. (hexane), filtration, concd. (reduced pressure), cooled, collected, dried (vac.);

in tetrahydrofuran; toluene byproducts: HP(C(CH3)3)2, P2(C(CH3)3)4; LiP(C(CH3)3)2 suspended in toluene, cooled to -78 °C, GaBr soln. in 3:1 toluene/THF added dropwise, mixt. stirred, warmed to room temp. over 6 h, soln. heated to 50 °C for 1 h under reduced pressure; soln. filtered, solvent removed (vac.), residue redissolved (toluene), filtered, toluene extract stored at 7 °C for crystallization for several weeks;