Dissociation constants of some alkanolamines

Abstract

The dissociation constants of piperidine (PD), 1-piperidineethanol (1–PE), N-methylmorpholine (MML), 4-(2-hydroxyethyl)morpholine (4-EML), and tropine (TP) have been determined at 15.0, 25.0, 35.0, 45.0, and 60.0 °C. The standard state enthalpy changes of the dissociation reaction for these amines have been obtained from the dependence of the dissociation constants upon temperature.