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-18.104.22.168)
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.
Published with permission of the IUPAC by Advanced Chemistry Development, Inc., www.acdlabs.com, +1(416)368-3435 tel, +1(416)368-5596 fax. For comments or suggestions please contact firstname.lastname@example.org