A DTA Study of phenols

Abstract

A comprehensive DTA study is reported of ten polyhydroxy-phenols and eight naphthols and of the corresponding p-phenylazo benzoylchloride, p-nitrobenzoylchloride and 3,5dinitrobenzoylchloride derivatives, prepared 'in situ' by heating intimate mixtures of phenol and acid chloride in a conventional DTA system. The thermal analysis data and, in particular, the derivative formation temperatures, are interpreted in terms of the inductive, mesomerie and steric effects associated with the phenol and acid chloride and the extent of inter-and intramolecular hydrogen-bonding existing in these systems. The DTA data collectively, provide a comprehensive data base for the identification and characterisation of these phenols via DTA.