Naming Carboxylic Acid Derivatives Esters,RCO,R' Esters are named by first identifying the alkyl group attached to the oxygen and then the carboxylic acid with the -ic acid ending replaced by -ate 0 CH3 0 OCH3 CH3 CH3O1 C H3C OCH2CH3 Ethyl acetate Dimethyl malonate tert-Butyl cyclohexane- carboxylate Esters, RCO2R′ ▪ Esters are named by first identifying the alkyl group attached to the oxygen and then the carboxylic acid with the –ic acid ending replaced by -ate Naming Carboxylic Acid Derivatives