in benzene react. under vac.; combination of Ph2GaCl and As-compd. in C6H6 (ratio Ph2GaCl : As-compd. = 3:1) in a bulb (cooled to -196°C, degassed), stirring for 16 days at 80°C; removal of solvent and Me3SiCl in vac., extn. with hot ligroin, addn. of C7H8 to the hot ext., cooling to -17°C for 3 days;

in benzene react. under vac. or N2 atmosphere; combination of Ph2GaCl in C6H6 and As-compd. in C6H6 (ratio Ph2GaCl : (Me3Si)3As = 2:1 or 3:1), stirring for 48 or 72 h at room temp.; removal of solvent and Me3SiCl in vac., extn. with ligroin, cooling of the combined exts. to -17°C for 11 days; elem. anal.;

in benzene react. under vac.; combination of Ph2GaCl and As-compd. in C6H6 (ratio Ph2GaCl : As-compd. = 3:1) in a bulb (cooled to -196°C, degassed), stirring for 16 days at 80°C; removal of solvent and Me3SiCl in vac., extn. with hot ligroin, addn. of C7H8 to the hot ext., cooling to -17°C for 3 days;

in benzene heating a 1:1 mixture of Ph2GaCl and (Me3Si)3As at 76°C; detected by (13)C NMR;