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Question

Identify X in the given reaction.
RMgX+RSHDry Ether−−−−−X

A
RSH
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B
RH
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C
RH
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D
None of the above
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Solution

The correct option is B RH
Grignard reagent is a strong nucleophile as well as strong base thus Grignard reagent act as a base whenever it reacts with compound containing active hydrogen and form hydrocarbon.
When grignard reagent reacts with thiol, it produces alkane. This is because alkyl group of grignard reagent is basic which react with the active hydrogen of thiol that is -H of SH group.
RMgX+RSHThiolDry Ether−−−−−RH+Mg(SR)X

Mechanism

Hence correct option is b.

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