Synthesis and structural studies (1H, 13C, 31P NMR and X-ray) of new C-bonded cyclotriphosphazenes with heterocyclic substituents from novel phosphinic acid derivatives

摘要

Three new C-bonded cyclotriphosphazenes, N3P3(2-thienyl)6{,} 2{,} N3P3(3-thienyl)6{,} 4{,} and N3P3(3{,}3prime or minute]-bithienyl-2,2prime or minute-ylene)3{,} 6{,} have been prepared by two new synthetic procedures and are the first examples of non-spiro and trispirocyclotriphosphazene derivatives composed of thiophene and 3{,}3prime or minute-dithiophene substituents{,} respectively. Their 1H{,} 13C and 31P NMR parameters are given. The solid state structures of 2{,} 4 and 6 have been determined by X-ray crystallography.