The Reactions of Phosphazenes With Difunctional and Polyfunctional Nucleophilic Reagents

After a brief introduction of the reaction patterns of N3P3Cl6 and N4P4Cl8 with monofunctional nucleophilic reagents, the reactions of these two chlorocyclophosphazenes with difunctional, trifunctional and tetrafunctional nucleophilic reagents are surveyed. These reagents contain aliphatic and aromatic hydroxyl and primary and secondary amino groups. Spiro, ansa, dangling and bridging units have been observed as well as a combination of these. The stability of the various ring systems is discussed. Crystal structures and 1H, 13C and 31P n.m.r. spectroscopic studies are reported.