Isotopomeric ion

IUPAC RECOMMENDATIONS 2013
Isotopomeric ion
Isomeric ions having the same numbers of each isotopic atom but differing in their positions within the ion. Note 1: Examples are D2C=CH2+ and HDC=CHD+. Note 2: Isotopomeric ions can be either configurational isomers in which two atomic isotopes exchange positions or isotopic stereoisomers. Note 3: Isotopomer is an abbreviation of isotopic isomer.
Related Term(s):
Reference(s): 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. O. D. Sparkman. Mass Spec Desk Reference. Global View Publishing, Pittsburgh (2006).
From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.
Index of Recommended Terms

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Gold Book

GOLD BOOK DEFINITION IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997).
Isotopomeric ion
http://goldbook.iupac.org/I03352.html isotopomer 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
IUPAC Gold Book
Index of Gold Book Terms