Parameters to measure separately the ability of a solvent to enter into non-specific solvent–solute interactions (@[email protected] \(\varepsilon\) and @[email protected] \(\eta _{\text{D}}\)) and specific solvent–solute interaction (solvent @[email protected] or @[email protected] \(B\) and solvent @[email protected] or @[email protected] \(E\)) as contributing to overall solvent @[email protected]