The reaction product of m‐cresol and phosphorus pentoxide has been shown by 31P‐nmr to consist of an equimolar mixture of mono‐ and di‐m‐cresyl phosphate. A mixture of pure di‐m‐cresyl phosphate and m‐cresol is an excellent polymerization medium for the preparation of polyquinolines via the Friedländer reaction, giving higher‐molecular‐weight polymers than can be obtained from the crude reaction of m‐cresol and phosphorus pentoxide. Spin‐lattice relaxation times T1 have been used to relate the chain mobility of the polymers in solution to the glass transition temperature (Tg) in the solid.
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Beever et al. (1978) studied this question.
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