Compounds Containing a N-C(-N)=N Group

Rule C-961

961.1 - The compound is named "guanidine" and numbered as shown.

961.2 - Derivatives of guanidine are named (a) as substitution products of guanidine or (b), if the substituent carries a group to be cited as suffix, by use of the prefix "guanidino-" for the radical NH2-C(=NH)-NH-. Locants 1 and 3 are used for substituents of an NH2 group, and 2 for a substituent of the =NH group. If the position of the double bond is not proved, primes are used (where there is a choice, as few primes as possible). The group (NH2)2C=N- is named "diaminomethyleneamino-".

Examples to Rule C-961.2



(When the position of the double bond is uncertain, the last compound is named N,N,N'-trimethylguanidine.)


p-(1,3-Dimethyl-3-phenylguanidino)benzoic acid

(Diaminomethyleneamino) acetic acid

961.3 - Salts formed from guanidine and its derivatives are named as guanidinium salts. Locants for substituents are assigned as in Rule C-961.2.

Example to Rule C-961.3

1,1,3-Triethylguanidinium chloride

See Recommendations'93 Table 31(a)

Compounds Containing a N-C(-N)=N Group C-962
Compounds Containing a N-CO-N or Related Group C-971, C-972, C-973, C-974, 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.,, +1(416)368-3435 tel, +1(416)368-5596 fax. For comments or suggestions please contact