Question

JEE MAINS CHEMISTRY QUESTION SEPTEMBER 2020

Answer 1

we have to write IUPAC name of the given compound.

5 - formyl - 2 - (hydroxylmethyl) - 4 - nitro aniline

1 - Amino - 5 - Formyl - 2 - (hydroxylmethyl) - 4 - nitro benzene

3 - amino - 4 - (hydroxylmethyl) - 6 - nitro benzene carbaldehyde

5 - Amino - 4 - (hydroxylmethyl) - 2 - nitro - benzene carbaldehyde

solution : we must give priority to - CHO , for numbering of carbon atoms attached with functional groups.

here two numberings are possible,

1. 3, 4, 5

2. 5, 4, 2

we should second one because it was more preferable to first one.

numbering has shown in diagram.

so, name of given compound will be ...

5 - Amino - 4 - (hydroxylmethyl) - 2 - nitro benzene carbaldehyde

Therefore the correct option is (4) 5 - Amino - 4 - (hydroxylmethyl) - 2 - nitro benzene carbaldehyde.