A Modified Method for Preparation of a Pure Octachlorocyclotetraphosphazene

Abstract

A modified method for preparing larger quantities of pure octachlorocyclo-tetraphosphazene, in which phosphorus pentachloride reacts with ammonium chloride in 1,1,2,2-tetrachloroethane in presence of anhydrous cobalt(II) chloride and nitrogen atmosphere, has been developed. With our new method, cheaper starting materials are used, reaction time is shorter, less by-products are produced, separation of (PNCl₂)₄ is easier and yielded higher than previously reported method, thus leading to a product of a good purity.

Key Words:

• Cobalt (II) chloride
• cyclic chlorophosphazenes
• octachloro-cyclotetraphosphazene
• phosphorus-nitrogen compounds
• phosphorus pentachloride
• polyphosphazenes