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| Class | Formula![]() |
Prefix | Suffix | Cf. Rule |
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| Cations | -onio | -onium | C-82 | |
| -onia | -onium | B-6 | ||
| Carboxylic | -COOH | Carboxy | -carboxylic acid | C-401 |
| acid | -(C)OOH | - | -oic acid | |
| Sulfonic acid | -SO3H | Sulfo | -sulfonic acid | C-641 |
| Salts | -COOM | - | Metal...carboxylate | C-461 |
| -COOR | - | Metal...oate | ||
| Esters | -COOR | R-oxycarbonyl | R...carboxylate | C-463 |
| -(C)OOR | - | R...oate | ||
| Acid halides | -CO-Halogen | Haloformil | -carbonyl halide | C-481 |
| -(C)O-Halogen | - | -oyl halide | ||
| Amides | -CO-NH2 | Carbamoyl | -carboxamide | C-821 |
| -(C)O-NH2 | - | -amide | C-822 | |
| Amidines | -C(=NH)-NH2 | Amidino | -carboxamidine | C-951 |
| -(C)(=NH)-NH2 | - | -amidine | ||
| Nitriles | -CN | Cyano | -carbonitrile | C-832 |
| -(C)N | - | -nitrile | ||
| Aldehydes | -CHO | Formyl | -carbaldehyde | C-301 |
| -(C)HO | Oxo | -al | C-301 | |
| Ketones | >(C)=O | Oxo | -one | C-311 |
| Alcohols | -OH | Hydroxy | -ol | C-201 |
| Phenols | -OH | Hydroxy | -ol | C-202 |
| Thiols | -SH | Mercapto | -thiol | C-511 |
| Hydro- peroxides |
-O-OH | Hydroperoxy | - | C-218 |
| Amines | -NH2 | Amino | -amine | C-812 |
| Imines | =NH | Imino | -imine | C-815 |
| Ethers | -OR | R-oxy | - | C-211 |
| Sulfides | -SR | R-thio | - | C-514 |
| Peroxides | -O-OR | R-dioxy | - | C-218 |
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 protected]