Question

According to IUPAC convention, name of the following compound is:

• A. 3-chloro-5-ethyl ethylbenzoate
• B. ethyl-3-chloro-5-ethylbenzoate
• C. metachloro-metaethyl ethylbenzoate
• D. both 'b' and 'c' are correct

Answer 1

Answer: (B)

ethyl-3-chloro-5-ethylbenzoate

According to IUPAC convention, name of the given compound is ethyl 3-chloro-5-ethyl benzoate. The aromatic esters are named alkyl benzoates. Hence, the given ester is named as ethyl benzoate. It contains one ethyl substituent and one chloro substituent. The numbering starts from the C to which ester group is attached. The group named first in the alphabetical order gets the lowest number provided it does not violets the lowest locant rule for all the substituents.