Conversion of benzene diazonium chloride to chlorobenzene is an example of which of the following reactions?
A
Claisen
B
Friedel-craft
C
Sandmeyer
D
Wurtz
JEE MAIN 2014, Difficult
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C
Sandmeyer
c $\underset{\begin{smallmatrix}
\,\text{Benzene} \\
\text{diazoniumchloride}
\end{smallmatrix}}{\mathop{{{C}_{6}}{{H}_{5}}{{N}_{2}}Cl}}\,\,\,\xrightarrow[or\,Cu+HCl]{CuCl/HCl}\,\underset{\text{Chloro benzene}}{\mathop{{{C}_{6}}{{H}_{5}}Cl}}\,\,\,+\,{{N}_{2}}$
The above reaction is known as Sandmayer 's reaction.
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Replacement of $Cl$ of chlorobenzene to give phenol requires drastic conditions but chlorine of $2,\,4-$ dinitrochlorobenzene is readily replaced because.