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What are A and B in the following reaction?

Options

  1. ANone of these

Correct answer

1

Step-by-step solution

Initially, 1 - bromo - 3 - cholorobenzene reacts with magnesium in ether. In this reaction, bromine being more reactive than chlorine selectively reacts to form Grignard reagent phenylmagnesium bromide. Next reaction is the reaction of Grignard reagent with CH 3 CHO . Griganrd reagent reacts with acetaldhyde to form a secondary alcohol. The alcohol formed is very prone to E 1   elimination reaction, since the carbocation formed will be stabilised by resonance. So, the weak acid ammonium chloride is used in the

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