An experimentally observable effect symbolized by
(on reaction rates, etc.) of
intramolecular coulombic interaction between the centre of interest and a remote unipole or dipole,
by direct action through space rather than through bonds. The magnitude of the field
effect (or '
direct effect') depends on the unipolar charge/
dipole moment, orientation of dipole, shortest distance between the centre of interest and the
remote unipole or dipole, and on the effective
dielectric constant.
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1115
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.
