In the reaction
The product \(E\) is :
The product \(E\) is :
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The Correct Option is A
Solution and Explanation
\(\mathrm{CuCN/KCN}\), heat: Sandmeyer-type replacement of \(\mathrm{N_2^+}\) by \(\mathrm{-CN}\) with loss of \(\mathrm{N_2}\).
E = p-tolunitrile (4-methylbenzonitrile), the benzene ring with CN and \(\mathrm{CH_3}\) para to each other. This is the first structure.
Answer: (1) 4-methylbenzonitrile (p-tolunitrile)
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