As an alternative, the names "methylene", "ethylene", and "phenylene" may be used to designate (methanediyl), (ethane-1,2-diyl), and (benzenediyl),
respectively. The suffix "-ylene" should not be used with the mononuclear silicon, germanium, tin, or lead parent hydrides for substituent names but is allowed for the :CH2 and
:SiH2 radicals (see R-220.127.116.11)
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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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