Koppel–Palm solvent parameters

https://doi.org/10.1351/goldbook.K03412
Parameters to measure separately the ability of a solvent to enter into non-specific solvent–solute interactions (
permittivity
ε and
refractive index
ηD) and specific solvent–solute interaction (solvent
basicity
or
nucleophilicity
B and solvent
acidity
or
electrophilicity
E) as contributing to overall solvent
polarity
.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1134 [Terms] [Paper]