With ammonia it forms a monoammine and a pentammine. Methyl gallium dichloride monoammine does not melt up to 800. Its vapor pressure is below 0.01 mm. at 250. The pentammine is insoluble in liquid ammonia and has a dissociation pressure of about 25 mm. at room temperature. The ammonia is readily pumped off at 800. 1 DUPONT FELLOW in Chemistry. 2 These PROCEEDINGS, 19, 292-298 (1933). Moser and...