Question

The IUPAC name of the following compound is:

• A. 1-Ethyl-4-Fluoro-3-nitro benzene
• B. 1-Ethyl-2-Fluoro-1-nitro benzene
• C. 3-Ethyl-6-Fluoro-1-nitro benzene
• D. 4-Ethyl-1-Fluoro-2-nitro benzene

Hint:

When naming substituted benzene compounds, number the ring so that the substituents receive the lowest possible numbers. The priority of substituents generally follows: nitro>fluoro>ethyl.

Answer 1

The Correct Option is A

In the given compound, we need to follow the IUPAC naming rules for substituted benzene rings. First, we number the benzene ring starting from the substituent with the highest priority (in this case, Nitro \( NO_2 \)). After the nitro group, the fluoro group (\( F \)) is positioned in the 4th position and the ethyl group (\( C_2H_5 \)) is in the 1st position.
Thus, the IUPAC name for this compound is 1-Ethyl-4-Fluoro-3-nitro benzene.