Table C-II Some General Classes of Compound in the Order in which the Characteristic Groups Have Decreasing Priority for Citation as Principal
- Onium and similar cations (see Subsection C-0.8)
- Acids: in the order COOH, C(=O)OOH, then successively their S and Se derivatives, followed by sulfonic, sulfinic acids, etc.
- Derivatives of acids: in the order anhydrides, esters, acyl halides, amides, hydrazides, imides, amidines, etc.
- Nitriles (cyanides), then isocyanides
- Aldehydes, then successively their S and Se analogues; then their derivatives
- Ketones, then their analogues and derivatives, in the same order as for aldehydes
- Alcohols and phenols; then their S, Se and Te analogues; then neutral esters of alcohols and phenols with inorganic acids, except hydrogen halides, in the same order
- Amines; then imines, hydrazines, etc.
- Ethers; then successively their S and Se analogues
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