## Wikipedia - Progetto:Chimica (it) Hansch constant

https://doi.org/10.1351/goldbook.H02736
A measure of the capability of a solute for @H02907@ @L03572@ interaction based on the @P04437@ $$P$$ for distribution of the solute between octan-1-ol and water. The most general way of applying $$P$$ in @C01346@, @Q04966@, etc. is as log $$P$$, but the behaviour of substituted benzene derivatives may be quantified by a substituent constant scale, $$\pi$$, which is defined in a way analogous to the Hammett σ scale. There are various scales, depending on the substrate series used as reference.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1119 [Terms] [Paper]