A polymer with an alternating phosphorus–nitrogen backbone and typically two substituents at phosphorus. Polar bonding and negative hyperconjugation differ from a continuously conducting conjugated carbon backbone.
A phosphazene polymer with two ethoxy substituents at each phosphorus, commonly prepared by alkoxide substitution of linear polydichlorophosphazene.
A linear phosphazene polymer with two chlorine substituents per phosphorus, used as a precursor for macromolecular nucleophilic substitution.
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