己 Acid halides:RCoX Acid halides are named by identifying first the acyl group and then the halide. The acyl group names is derived from the carboxylic acid names by replacing the -ic acid e ending with -yl or the -carboxylic acid ending with -carbonylOrganic Chemistry Organic Chemistry Xiamen Xiamen University University Acid halides: RCOX „ Acid halides are named by identifying first the acyl group and then the halide. The acyl group names is derived from the carboxylic acid names by replacing the –ic acid ending with –yl or the –carboxylic acid ending with –carbonyl