where the numerator denotes the variance of the total dipole moment of the system, 𝑁 the number of dipoles present in a given system, and 𝜇 the average value of the dipole moment. As already mentioned, intermolecular H-bond network critically influences the relative arrangements of molecular dipoles in space (dipolar correlations) and thus loss of dipolar correlations must accompany frustrations in the intermolecular H-bond network. We have therefore examined the H-bond network of acetamide in these DESs by calculating the average number of H-bonds per acetamide molecules in these DESs and in the neat molten acetamide.