Types of Carbonyl Compounds General Name General Name Name formula ending Name formula ending Aldehyde -al Ester -oate Ketone -one Lactone None R (cyclic ester) Carboxylic oic acid acid Thioester -thioate Acid halide -yl or-oyl halide Amide -amide Acid oic anhydride anhydride Lactam None (cyclic amide) Acyl -yl phosphate phosphate R