multiply labelled

https://doi.org/10.1351/goldbook.M04063
A @S05556@ compound may be multiply labelled when in the unmodified compound there is more than one atom of the same element at the position where the isotopic modification occurs, e.g. H in CH4, or there are several atoms of the same element at different positions where the isotopic modification occurs, e.g. C in C4H8O.
Sources:
Blue Book, p. 515 [Terms] [Book]
PAC, 1981, 53, 1887. (Nomenclature of inorganic chemistry: II.1 - Isotopically modified compounds) on page 1893 [Terms] [Paper]
Citation: 'multiply labelled' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.M04063 RIS BibTex EndNote
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Last revised: February 24, 2014