Calorimetric study of deuterium isotope effects in water-acetone systems

Abstract

Molar excess enthalpies of H₂0 + (CH₃),CO, H₂0 + (CD₃),C0, D₂0 + (CH₃)₂C0 and D₂0+ (CD₃)₂CO at 298.15 K are reported and, in the case of the first system, compared with earlier studies. The results are comparable to those reported for deuterium isotope effects in the molar excess enthalpies of other systems containing (CH₃)₂CO and (CD₃)₂CO; they do not suggest the occurrence of any deuterium exchange reactions. A calorimetric study of the mixing of (CD₃)₂CO with H₂O containing a small quantity of NaOH indicates the occurrence of slow, exothermic reaction(s).