Isomers having the same number of each isotopic atom but differing in their positions.
The term is a contraction of '
isotopic isomer'. Isotopomers can be either constitutional isomers (e.g.
CH2DCH=O
and
CH3CD=O) or isotopic
stereoisomers [e.g. (
R)- and (
S)-
CH3CHDOH
or (
Z)- and (
E)-
CH3CH=CHD].
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1132
PAC, 1996, 68, 2193
(Basic terminology of stereochemistry (IUPAC Recommendations 1996))
on page 2211
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.
