relative hardness

The difference between the values of the absolute hardnesses ( $η$ ) of a given molecule and the corresponding reference structure ( $η a$ ): $η r = η − η a$ . The values of relative hardnesses correlate well with the resonance energies of cyclic compounds and may be used as an index of aromaticity.

Source:

PAC, 1999, 71, 1919 (Glossary of terms used in theoretical organic chemistry) on page 1960

Interactive Link Maps
First Level	Second Level	Third Level

Cite as:
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. https://doi.org/10.1351/goldbook.

Last update: 2014-02-24; version: 2.3.3.

DOI of this term: https://doi.org/10.1351/goldbook.RT07092.

Original PDF version: http://www.iupac.org/goldbook/RT07092.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.

Current PDF version | Version for print | History of this term

PREVIOUS	RT07092	NEXT
relative error		relative humidity