in neat (no solvent) byproducts: H2; in a quartz tube heated to 500-550°C in a stream of Br2 in Ar; sublimation at 600°C, purity 99percent;

aluminium in solid Ln2O3, AlBr3 (Ln:Al = 1:4) and Al powder were placed into an one-end sealed quartz tube under Ar, sealed under vac., heated at 600 K for 1 h; sealed tube was placed in a tubular furnace with a reduced temp. gradient from 750 to 460 K, vapor transport reaction for 6 h, tube was quicklyremoved from the furnace, the hot end was quenched with water, AlBr3 wa s condensed;

in neat (no solvent) byproducts: H2, NH3; excess NH4Br, heating under Ar (320°C), then in vac. (550°C); sublimation (vac., 700°C);