MCQ
Propene when heated with chlorine at about ${500\,^o}C$ forms
- ✓$C{H_2}Cl.CH = C{H_2}$
- B$C{H_3}.CHCl.C{H_2}Cl$
- C$C{H_2}Cl.CHCl.C{H_2}Cl$
- DAll the three
✓
Answer
Correct option: A.
$C{H_2}Cl.CH = C{H_2}$
a
(a) $C{H_3} - CH = C{H_2} + C{l_2}\xrightarrow{{500{\,^o}C}}$ $\begin{array}{*{20}{c}}
{C{H_2} - CH = C{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array} + HCl$
(a) $C{H_3} - CH = C{H_2} + C{l_2}\xrightarrow{{500{\,^o}C}}$ $\begin{array}{*{20}{c}}
{C{H_2} - CH = C{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array} + HCl$
This reaction is called allylic halogenation reaction because halogenation occurs at the allylic position of an alkene
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