A Thermolysis Study of Poly(Trimethylene Phenylphosphinate) and Poly(2,2-Dimethyltrimethylene Phenylphosphinate). NMR and X-Ray Structure of 2-Oxo-2-Phenyl-4,4-Dimethyl-1,2-Oxaphospholan

Abstract

The syntheses of polyphosphinates 2 and 2a by the ring-opening polymerization of cyclic phosphonites 1 and 1a with CH₃I as an initiator have been reported in literature^1–3. These polymers thermally decompose to give oxaphospholan 3 and 3a. In this paper, we present evidence on the mechanism of their formation.