Synthesis of the first phosphazene random copolymers containing thiophenoxy groups

Abstract

The reaction of [NPCl2]n with substoichiometric amounts of the thiophenols HS—C6H4—R (R = H, Br) and Cs2CO3 in THF at room temperature, gave solutions of {[NPCl2]1-x[NP(S—C6H4—R)2]x}n [R = H (1a), Br (1b)]. The reaction of the derivative with R = Br and x = 0.3 with HO—C6H4—Br gave the random copolymer {[NP(O—C6H4—Br)2]0.7 [NP(S—C6H4—Br)2]0.3}n (2); similarly, the reaction of 1 with the biphenol HO—C6H4—C6H4—OH gave the random copolymers {[NP(O2C12-H8)]0.75[NP(S—C6H4—R)2]0.25}n [R = H, (3a); R = Br, (3b)] as soluble and stable white solids.