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Acyl Substitution Revisited

The reagent w...

Question

The reagent which does not give acid chloride on treating with a carboxylic acid is:

A

P C l_{5}

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B

C l_{2}

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C

S O C l_{2}

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D

P C l_{3}

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Solution

The correct option is B $C l_{2}$
$C H_{3} C O O H + P C l_{5} \to C H_{3} C O C l + P O C l_{3} + H C l$
$C H_{3} C O O H + C l_{2} \to C H_{2} (C l) C O O H + H C l$
$C H_{3} C O O H + S O C l_{2} \to C H_{3} C O C l + S O_{2} + H C l$
$C H_{3} C O O H + P C l_{3} \to 3 C H_{3} C O C l + H_{3} P O_{3}$

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