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Isotopically Modified Compounds

R-8.3.4 Isotopically deficient compounds

An isotopically labelled compound may be designated as isotopically deficient when the isotopic content of one or more elements has been depleted, i.e., when one or more nuclide(s) is(are) present in less than the natural ratio.

R-8.3.4.1 Isotopic deficiency is denoted in the formula by adding the italicized syllable 'def' immediately preceding, without a hyphen, the appropriate nuclide symbol.

Examples to R-8.3.4.1

Note: According to one's viewpoint, one may also use .

R-8.3.4.2 The name of an isotopically deficient compound may be formed by adding the italicized syllable def immediately preceding, without a hyphen, the appropriate nuclide symbol, both enclosed in square brackets and cited before the name or that part of the name that is isotopically modified.

Examples to R-8.3.4.2

See Table 18

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This HTML reproduction is as close as possible to the published version [see IUPAC, Commission on Nomenclature of Organic Chemistry. A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993), 1993, Blackwell Scientific publications, Copyright 1993 IUPAC]. If you need to cite these rules please quote this reference as their source.

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