Heterocyclic Systems

Rule B-6. Cationic Hetero Atoms

6.1 - According to the "a" nomenclature, heterocyclic compounds containing cationic hetero atoms are named in conformity with the preceding rules by replacing "oxa-", "thia-", "aza-", etc., by "oxonia-", "thionia-", "azonia-", etc., the anion being designated in the usual way. Cationic hetero atoms follow immediately after the corresponding noncationic atoms: oxonia follows oxa, thionia follows thia, azonia follows aza, etc. (cf. Table B-I). (cf. Rule C-82 and C-83).

Examples to Rule B-6.1

1-Oxoniaanthracene chloride

4a-Azoniaanthracene chloride

1-Thioniabicyclo[2.2.1]heptane chloride

1-Methyl-1-oxoniacyclohexane chloride

See Recommendations'93 R-5.8.2


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