Synthesis and study of some new tricyclocphosphazene containing organosulfur and -selenium compounds as fire retardants

A new series of hexaarylthiocyclophosphazenes and hexaarylselenocyclophosphazenes (i.e. n3p3(e-c6h4-r)6,where e= s,r= h(1); e= s,r= och3(2); e= s,r= ch3(3); e= se,r= h(4); e= se,r= och3(5) and e= se,r= ch3(6)) were prepared in good yields by reaction of the corresponding arylthiolate and arylselenolate anions with hexachlorocyclophosphazene under argon atmosphere. the thermal properties of compounds 1-6 were studied by tga. all prepared compounds showed a good thermal stability. char yields were between 37-68% at750°c for compounds 1- 6. all compounds were characterized by elemental analysis,ft-ir,1h,13cand 31pnmr and thermal gravimetric techniques.