An approach to applicable inorganic polymers. II. Pyrolytic and other reactions of B‐trichloro‐R‐triarylborazoles

Abstract

AbstractThe evolution of hydrogen chloride during the pyrolysis of certain B‐trichloro‐N‐triarylborazoles, (ClBNAr)3, at temperatures up to about 500°, points to the formation of boron‐carbon bonds, thereby effecting polycondensation. Formation of arylamine hydrochloride and arylaminoboron dichloride and infra‐red studies point to borazole‐ring fission, and polycondensation in a linear sense. The polymeric residue, liquid above about 300°, was a hard solid at room temperature, soluble in certain organic solvents, but was susceptible to hydrolysis. The material became solid above 500°, and was then insoluble and of considerable hydrolytic and oxidative stability.Replacement of chlorine in the chloroborazoles by alkyl groups, hydrogen, amino and alkylamino groups is considered with reference to hydrolytic stability and future pyrolytic studies.