The products formed in the following reaction sequence are : [figure]
- [figure]
- [figure]
- [figure]
- [figure]
Answer
(4) [figure]
Solution
[figure]
[figure]
[figure]
(i) -NO2 is meta-directing, so Br enters meta
(ii) -NO2 -NH2; (iii) diazotisation
(iv) ethanol replaces -N2+ by H and is itself oxidised to CH3CHO
A + B = bromobenzene + CH3-CHO
Answer: (4)