Which of the following reagent is used in the conversion of benzene diazonium chloride to chlorobenzene?

C u_{2} C l_{2}

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C u C l_{2}

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F e C l_{2}

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F e C l_{3}

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Solution

The correct option is B $C u_{2} C l_{2}$
The reagent used in the conversion of benzene diazonium chloride to chlorobenzene is $C u_{2} C l_{2}$ .

The reaction is known as Sandmeyer reaction. It is the replacement of diazonium group by $- C l$ or $- B r$ group using cuprous salts. The product is haloarene.

$P h - N_{2} C l C u_{2} C l_{2} - --- \to P h - C l + N_{2} ↑$

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