Structural changes of water caused by non-electrolytes: Volumetric and compressibility approach for urea-like analogues

The properties of the hydration spheres formed around investigated solutes have been characterised based on four parameters: (i) empirical slope for the dependency of the apparent molar volume on the concentration, (ii) difference between standard partial molar volume and van der Waals volume, (iii) standard partial molar compression, (iv) temperature dependency of the standard partial molar compression. The obtained results have been discussed and compared with the solvation properties of the N-alkyl derivatives of urea.