Suffix carbonyl chloride

An acid halide is named by replacing the -ic acid suffix of the acid name with -yl and the halide name. For acids that are named as alkanecarboxylic acids, the acid chlorides are named by using the suffix -carbonyl chloride. 

When the - COCl group is bonded to a ring Change the suffix -carboxylic acid to -carbonyl chloride. 

Similar to the -carbonyl chloride suffix for acyl chlorides, -carboxamide is used when an amide group is attached to a ring. 

In the case of multiple and cyclic carboxylic acids (and their derivatives) the acid group is treated as a unit corresponding to the suffix modes. .. carboxylic acid,... carboxamide,... carbonyl chloride, etc. 

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