Free Radicals, Ions, and Radical Ions
Positive and Negative Ionic Centres in a Single Structure Rule C-87 87.1 - When positive and negative ionic centres are present in a single structure, the compound is named by giving the name of the cationic group
directly before that of the anionic group. This can be done (a) by considering that a cationic group, designated by a prefix, is substituted into an anion, the names of cationic substituents
being formed by changing the ending "-ium" of the cation name into "-io", or (b) by considering that an anionic substituent, designated by a suffix, is substituted into a cation.
See Recommendations'93 R-5.8.5
Examples to Rule C-87.1
(trivial name, betaine, see Rule C-816.1)
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