Acid Chloride are the derivatives of carboxylic acids which have –COCl group in it.


1.Start numbering from the carbon of –COCl.

2.For naming:  alkane-e+ oyl chloride

In the above compound, five carbon is present.

Thus the name of the compound is- pentane-e + oyl chloride

3.If two -COCl group is present, always keep the -COCl on the two terminals irrespective of the length of the chain.

4.It is named as: Alkanedioyl dichloride

pentanedioyl dichloride
2-propylhexanedioyl dichloride

5.If three -COCl is present, the stem chain holding the -COCl group directly is considered as the parental chain.

6. It is named as : Alkane-x,y,z-tricarbonyl trichloride

Nomenclature of Acid Chlorides
Nomenclature of Acid Chlorides

7.If three -COCl is present but of it is not directly attached to the stem chain. Then the longest chain holding two -COCl in the terminals are chosen as the parental chain. and the 3rd -COCl is named as : chloro oxo alky

Nomenclature of Acid Chlorides

Nomenclature of Acid Chlorides

Try out the following:

Draw the structure of the following

  1. 4-(2-chloro-2-oxoethyl)-3-methylnonanedioyl dichloride
  2. 2,5-dichlorohex-3-enedioyl dichloride
  3. 4,5-bis(2-chloro-2-oxoethyl)octanedioyl dichloride
  4. 4-(2-chloro-2-oxoethyl)-6-(1-chloro-1-oxopropan-2-yl)nonanedioyl dichloride
  5. hepta-2,6-dien-4-yne-1,2,7-tricarbonyl trichloride
  6. 4-(4-chloro-4-oxobutan-2-yl)-5-(2-chloro-2-oxoethyl)octane-1,3,8-tricarbonyl trichloride