Aggregation of complexes of some phenols with triethylamine in benzene

Abstract

The practical molal osmotic coefficients and molal activity coefficients of triethylamine complexes with pentachlorophenol and 2,6-dibromo-4-nitrophenol in benzene solution were determined by vapour pressure osmometry (v.p.o.) over the concentration range 0.03–0.45 mol kg^–1 at 27,35,40, and 50 °C. The non-ideal behaviour of the investigated system is interpreted in terms of an association model, which includes an extended series of multimers, and thermodynamic parameters are derived. It is shown that Beer's law does not describe these solutions.