MCQ
Catalyst used in dimerisation of acetylene to prepare chloroprene is
  • A
    $HgS{O_4} + {H_2}S{O_4}$
  • B
    $C{u_2}C{l_2}$
  • $C{u_2}C{l_2} + N{H_4}Cl$
  • D
    $C{u_2}C{l_2} + N{H_4}OH$

Answer

Correct option: C.
$C{u_2}C{l_2} + N{H_4}Cl$
c
Acetylene dimerized to give vinyl acetylene when it combines with hydrogen chloride to form $4$-chloro-$1, 2$-butadiene, an allene derivative, which in presence of cuprous chloride $\left( Cu _2 Cl _2\right)$ and ammonium chloride $\left( NH _4 Cl \right)$, rearranges to form $2$- Chlorobuta-$1, 3$-diene.

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