Solvation of urea and methyl-substituted ureas by water and DMF

Authors:
  • JSJ. N. Spencer
    J. N. Spencer
  • JHJames W. Hovick
    James W. Hovick

Abstract
The hydrogen bond enthalpies of urea and methyl-substituted ureas with water and DMF have been determined by the pure-base calorimetric method. Transfer enthalpies between water and DMF have been calculated for dilute solutions of the ureas according to a previously developed model. The first solvation sphere of urea in water consists of five water molecules. Solvation spheres are given for other methyl-substituted ureas in water and DMF.

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