A quantitative representation of
selectivity in
aromaticsubstitution reactions
(usually
electrophilic, for monosubstituted benzene derivatives). If the
partial rate factor,
, expresses the reactivity of a specified position in the aromatic compound
PhX
relative to that of a single position in benzene, then the
selectivity factor
(expressing discrimination between
p- and
m-positions in
PhX) is defined as:
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1162
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.
