Q81 / 180 · AIIMS 2005 · Chemistry

$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CONHCH}_3$ can be converted into $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NHCH}_3$ by

  • A
    $\mathrm{NaBH}_4$
  • B
    $\mathrm{H}_2-\mathrm{Pd} / \mathrm{C}$
  • C
    $\mathrm{LiAl}_4$
  • Correct answer
    D
    $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$.

Solution

$\mathrm{C}_6 \mathrm{H}_5 \mathrm{CONHCH}_3 \stackrel{\mathrm{Zn}-\mathrm{Hg}}{\mathrm{HCl}} \mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{NHCH}_3$ This reaction is known as Clemmenson reduction.

Hence, the correct answer is option: 'D'.

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