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isodesmic reaction

A reaction (actual or hypothetical) in which the types of bonds that are made in forming the products are the same as those which are broken in the reactants, e.g.
I03272-1
I03272-2
Such processes have advantages for theoretical treatment. The Hammett equation as applied to equilibria [cf. (a)] essentially deals with isodesmic processes.
Source:
PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1128
InChI=1/C7H6O2/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H,8,9)/f/h8H
WPYMKLBDIGXBTP-FZOZFQFYCI
InChI=1/C7H5ClO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,(H,9,10)/p-1/fC7H4ClO2/q-1
XRHGYUZYPHTUJZ-UCTCPSKUCO
InChI=1/C7H5ClO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,(H,9,10)/f/h9H
XRHGYUZYPHTUJZ-BGGKNDAXCA
InChI=1/C7H6O2/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H,8,9)/p-1/fC7H5O2/q-1
WPYMKLBDIGXBTP-UJYIWYDQCH
InChI=1/C2H3Cl/c1-2-3/h2H,1H2
BZHJMEDXRYGGRV-UHFFFAOYAW
InChI=1/C2H4Cl2/c3-1-2-4/h1-2H2
WSLDOOZREJYCGB-UHFFFAOYAL
InChI=1/C2H4/c1-2/h1-2H2
VGGSQFUCUMXWEO-UHFFFAOYAE
InChI=1/C2H3Cl3/c3-1-2(4)5/h2H,1H2
UBOXGVDOUJQMTN-UHFFFAOYAA
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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. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.I03272.
Original PDF version: http://www.iupac.org/goldbook/I03272.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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