Isotopically Modified Compounds
R-8.2.1 Formulae The formula of an isotopically substituted compound is written as usual except that appropriate nuclide symbols are used. When different isotopes of the same element
are present at the same position, common usage is to write their symbols in order of increasing mass number, i.e.
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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