Ncert Exercises & Solutions

The IUPAC name of the given compound is-

1. 1-Chloro-2-nitro-4-methylbenzene

2. 1-Chloro-4-methyl-2-nitrobenzene

3. 2-Chloro-1-nitro-5-methylbenezene

4. m-Nitro-p-chlorotoluene

Hint: Numbering should be done according to the lowest locant rule

For tri or higher substituted benzene derivatives, the compounds are named by identifying substituent, positions on the ring by following the lowest locant rule.

The substituent of the base compound is assigned number 1 and then the direction of numbering is chosen such that the next substituent gets the lowest number. The substituents appear in the name in alphabetical order. Numbering the compound is as follows:

The IUPAC name of the compound is 1-Chloro-4-methyl-2-nitrobenzene.

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