IUPAC > Gold Book > alphabetical index > H > Hansch constant


Hansch constant
A measure of the capability of a solute for hydrophobic lipophilic interaction based on the partition coefficient Math - text for distribution of the solute between octan-1-ol and water. The most general way of applying Math - text in correlation analysis, QSAR, etc. is as log Math - text, but the behaviour of substituted benzene derivatives may be quantified by a substituent constant scale, Math - text, which is defined in a way analogous to the Hammett σ scale. There are various scales, depending on the substrate series used as reference.
PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1119
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2008-10-07; version: 2.0.2.
DOI of this term: doi:10.1351/goldbook.H02736.
Original PDF version (may be out of date): http://www.iupac.org/goldbook/H02736.pdf.
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