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Assertion : Alkyl benzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason : Alkyl halides are less reactive than acyl halides.
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Reason : Alkyl halides are less reactive than acyl halides.
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If both assertion and reason are true and the reason is not the correct explanation of the assertion
The monoalkyl derivative first formed readily undergoes further alkylation at a still greater speed to produce polysubstituted products, and alkyl halide employed may also undergo an isomeric change. Due to these difficulties alkyl benzene is not generally prepared by Friedel-Craft's alkylation of benzene.
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