Which of the following compounds does not react with $N a H S O_{3}$ ?

H C H O

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C_{6} H_{5} C O C H_{3}

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C H_{3} C O C H_{3}

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C H_{3} C H O

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Solution

The correct option is B $C_{6} H_{5} C O C H_{3}$
$N a H S O_{3}$ addition to carbonyl compound is an example of nucleophilic addition reaction.
Mechanism of addition of $N a H S O_{3}$ involves 2 steps.
Step-1: Nucleophilic attack on carbonyl carbon:
Step-2: Formation of an adductAcetophenones do not undergo this reaction because nucleophile is less approachable to the carbonyl carbon as it is more bulkier group present in this ketone.

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