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Question
Which of the following is the major monohalo product of the given reaction?
Which of the following is the major monohalo product of the given reaction?
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Solution
The correct option is A
The given reaction follows SNi mechanism.
This method is used for the preparation of alkyl halide from alcohol. The by-products of this reaction are gaseous in nature so it is easy to separate the product from the reaction. In this reaction, the lone pair on oxygen will attack the S atom and the C−O bond break to form carbocation. Then, Cl− attacks carbocation to form alkyl chloride.
In intramolecular nucleophilic substitution reaction, retention of configuration takes place. 
The given reaction follows SNi mechanism.
This method is used for the preparation of alkyl halide from alcohol. The by-products of this reaction are gaseous in nature so it is easy to separate the product from the reaction. In this reaction, the lone pair on oxygen will attack the S atom and the C−O bond break to form carbocation. Then, Cl− attacks carbocation to form alkyl chloride.
In intramolecular nucleophilic substitution reaction, retention of configuration takes place.
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