Solvation of N-methyl-2-pyrrolidone and N,N-dimethylpropanamide in cyclohexane, heptane, n-alkan-1-ols(C1-C4) and water at 298.15Â K

DMPA, having the hydrophobic CH2 groups and conformational flexibility, plausibly changes its conformation to ones that are more compact, and reduces its partial molar volume at infinite dilution in water than in organic solvents.