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The distinction between these replacement terms and the corresponding "a" replacement terms, thia, selena, and tellura, respectively, which indicate replacement of skeletal carbon atom, must be noted.


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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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