Sec 1 Acid Derivatives All can be converted to the carboxylic acid by acidic or basic hydrolysis. Esters and amides common in nature. R-C-NH, R-C≡ acid halide anhydride ester amide nitrile Condensed structure:RCOX (RCO),O RCO,R' RCONH, RCN Copyright2005 Pearson Prentice Hall,Inc. Sec 1 Acid Derivatives ◼All can be converted to the carboxylic acid by acidic or basic hydrolysis. ◼Esters and amides common in nature