Syntheses and Structures of Cyclic and Short-Chain Linear Phosphazenes Bearing 4-Pnehylphenoxy Side Groups

摘要

High polymeric phosphazenes from a class of inorganic/organic macromolecules thatpossess a wide range of unusual properties. The type of side-group attached to the polyphosphazene chain has a powerful effect on the physical and chemical characteristics. As part of our program to better understand the structure-property relationships in poly(organophosphazenes), we have synthesized a series of small molecule cyclic and linear phosphazenes as structural models for the corresponding high polymers. The value of small molecule phosphazene models for devising synthetic routes for the high polymers, and as tools to probe the possible structure of polymers, has been illustrated previously. In the present work, we report the syntheses of a series of cyclic and linear oligomeric phosphazenes that bear the 4-phenylphenoxy side-group.