Compounds Containing a N-CO-N or Related Group
Urea and Its Derivatives Rule C-974 974.1 - Compounds formed from urea, isourea, or their derivatives by replacement of oxygen by sulfur, selenium, or tellurium are named by
attaching a prefix "thio-", "seleno-", or "telluro-", respectively, directly before urea, ureido-, ureylene-, or uronium. Locants are used in the same way as for urea and
its derivatives; when necessary, a locant S, Se, or Te is used to assign substituents to these atoms.
See Recommendations'93 Table 31(a)
Examples to Rule C-974.1
When a choice between the two preceding structures cannot be made, the name is: N-Methyl-S-propylisothiourea.
For the above mesomeric cation the name is:
Compounds Containing a N-CO-N or Related Group C-975
Compounds Containing a N-CO-N-N or More Complex Group C-981, C-982, C-983, C-984, C-985
This HTML reproduction of Sections A, B and C of IUPAC "Blue Book" is as close as possible to the
published version [see Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979.
Copyright 1979 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 email@example.com