Two methods for the addition of pendent dialkyl phosphonate units onto aryloxyphosphazenes, at both the polymeric and cyclic trimer levels, are described. Sodium organophosphates or halogenated organophosphates were used as the phosphonating agents and were allowed to react with bromomethylene- or lithio-functionalized aryloxyphosphazenes, respectively. Phosphonation of bromomethylene-phenoxy side groups proceeded with ∼100% conversion, while phosphonation via lithiophenoxy intermediates yielded 80-85% conversion. The presence of a direct phosphorus-carbon bond in all products was confirmed by 13C NMR. Well-defined, cyclic trimers and polymers were obtained via both methods.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry