| abstract |
The addition compound of a carboxylic acid and a halide or a rare earth or gallium halocarboxylate of the same acid is obtained by a process in which one reacts with HX, X denoting a halogen, and in a solvent chosen from alkanes, cyclanes and solvents aromatics and their mixtures, a rare earth or gallium carboxylate, the reaction being carried out with an atomic ratio X / rare earth or gallium less than 3 in the case of the preparation of a halocarboxylate. The second process of the invention relates to the preparation of an anhydrous compound addition of a rare earth or gallium halide and a donor compound of nitrogen or oxygen in which an acid addition compound is prepared carboxylic and a rare earth halide of the previous type and we add in the middle obtained a nitrogen or oxygen donor. |