Nomenclature IUPAC formulation The root name is based on the longest continuous chain of carbon atoms bearing the carboxyl group. The -e is replaced by -oic acid The chain is numbered starting with the carboxyl carbon atom The carboxyl group takes priority over any other functional groups previously discussed. E.g. c-s-G6-s c CH,C-CH-C-OH H一C-OH CH,-C-OH CH3-CH-C-OH CH,CH,CH IUPAC name: methanoic acid ethanoic acid 2-cyclohexylpropanoic acid 2-acetylpentanoic acid common name: formic acid acetic acid a-cyclohexylpropionic acid a-acetylvaleric acid NH, Ph CH, -OH CH,-CH,一CH-CH2-C-OH CH-CH-H,一 -OH IUPAC name:4-aminobutanoic acid 3-phenylpentanoic acid 3-methylbutanoic acid common name:y-aminobutyric acid B-phenylvaleric acid isovaleric acid 2013 Peorson Educooon Inc Ch20 Carboxylic Acids (landscape) Page 2 Ch20 Carboxylic Acids (landscape) Page 2 Nomenclature IUPAC formulation The root name is based on the longest continuous chain of carbon atoms bearing the carboxyl group. The -e is replaced by -oic acid. The chain is numbered starting with the carboxyl carbon atom. The carboxyl group takes priority over any other functional groups previously discussed. E.g