Triphenylphosphazenyl-cyclotriphosphazenes and bicycle phosphazenes

Abstract

The work presented in this thesis consists of two parts. The first part deals with the preparation of (triphenylphosphazenyl)pentachlorocyclotriphosphazene, N?P?Cl?(NPPh?) and its reactions with primary and secondary amines. The second part describes the aminolysis reactions of chlorocyclotetraphosphazenes leading to the formation of bicyclic phosphazenes. The reaction of N?P?Cl? with four equivalents of liquid ammonia is also discussed in the latter part. Chapter I of the thesis presents an introduction to cyclophosphazene chemistry relevant to the present study. The following three aspects are given special attention: (i) Preparation of (phosphazenyl)cyclophosphazenes (ii) Aminolysis reactions leading to the formation of bicyclic phosphazenes (iii) Structural elucidation by IR spectroscopy Chapter II contains a detailed discussion of the results obtained in the present investigation. The last chapter (III) describes the experimental procedures adopted to prepare the various compounds and also the details of the spectroscopic measurements. The references to the literature are compiled at the end of the thesis and are indicated in the text by the appropriate number(s) in square brackets. The compounds prepared during the present study are represented by Arabic numerals in parentheses underlined by a wavy line. Phenyl-substituted chlorocyclophosphazenes are represented by Roman numerals in parentheses. These are listed at the end of the thesis.