Synthesis and spectroscopic properties of a new high molecular weight poly-spirophosphazene-oxypyridine copolymer and its complexes with W(CO)5 fragments

Abstract

The polyspirophosphazene copolymer {[NP(O2C12H8)]0.7[NP(OC5H4N)2]0.3}n (2); that carries pyridine side groups has been prepared from [NPCl2]n , by reaction first with 2,2?-dihydroxybiphenyl and potassium carbonate in THF to give a solution of the partially substituted polymer {[NP(O2C12H8)]0.7[NPCl2]0.3}n (1), followed by the reaction of the latter with 4-hydroxypyridine (HO / C5H4N) also in the presence of potassium carbonate. The reaction of (2) with [W(HOMe)(CO)5] in a CH2Cl2 /MeOH mixture gave the polymeric complex {[NP(O2C12H8)]0.7[NP(OC5H4N /W(CO)5)2]0.3}n (4), that, upon treatment with NCMe in THF produced derivatives with less metal carbonyl contents.