Protactinium tetrachloride with methyl cyanide

Protactinium pentaiodide crystallizes with orthorhombic symmetry (104) (Table III). The pentaiodide is extremely moisture-sensitive and hydrolyzes immediately on contact with water. It is slightly soluble in methyl cyanide, but insoluble in isopentane and carbon tetrachloride. [Pg.19]

Even fewer complexes with nitrogen donor ligands have been reported and all are methyl cyanide adducts (Tables X and XI). Protactinium pentabromide forms a soluble 1 3 complex in contrast to the 1 1 complexes formed by niobium and tantalum pentahalides (46). Other actinide pentahalide-methyl cyanide complexes are still unknown. Protactinium tetrachloride, tetrabromide, and tetraiodide react with anhydrous, oxygen-free methyl cyanide to form slightly soluble 1 4 complexes (44, 48) which are isostructural with their actinide tetrahalide analogs. [Pg.35]