Tantalum Oxychlorides

A tantalum oxychloride of composition TaO₂Cl has been obtained by subliming tantalum pentachloride in a vacuum at 500° C. Various oxychlorides of unknown composition are stated to be obtained by the action of tantalum pentachloride on alcohol solutions of hydrochloric acid. The following pyridine and quinoline addition compounds have been prepared: 4TaO₂Cl.7C₅H₅N; Ta₂O₃Cl₄.4(C₅H₅N.HCl); 2TaOCl₃.3(C₅H₅N.HCl).2C₂H₅OH; TaOCl₃.2(C₂H₅N. HCl).2C₂H₅OH; 2TaOCl₃.3(C₅H₅N.HCl).2C₂H₅OH; TaOCl₃.2(C₉H₇N. HCl).2C₂H₅OH.