The dissociation constants of piperidine (PD), 1-piperidineethanol (1-
PE), N-methylmorpholine (MML), 4-(2-hydroxyethyl)morpholine (4-EML), a
nd tropine (TP) have been determined at 15.0, 25.0, 35.0, 45.0, and 60
.0-degrees-C. The standard state enthalpy changes of the dissociation
reaction for these amines have been obtained from the dependence of th
e dissociation constants upon temperature.