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Haloalkanes And Haloarenes

Question
CBSEENCH12010502

Write structures of compounds A, B and C in each of the following reactions

straight C subscript 6 straight H subscript 5 Br space rightwards arrow with Mg divided by dry space ether on top space straight A space rightwards arrow from left parenthesis straight b right parenthesis space straight H subscript 3 straight O to the power of plus to left parenthesis straight a right parenthesis space CO subscript 2 space left parenthesis straight g right parenthesis of space straight B space rightwards arrow with space space space space space PCl subscript 5 space space space space space space on top space straight C

Solution
straight C subscript 6 straight H subscript 5 Br space rightwards arrow with Mg divided by dry space ether on top space straight C subscript 6 straight H subscript 5 MgBr space rightwards arrow from left parenthesis straight b right parenthesis space straight H subscript 3 straight O to the power of plus to left parenthesis straight a right parenthesis space CO subscript 2 space left parenthesis straight g right parenthesis of space straight C subscript 6 straight H subscript 5 COOH space rightwards arrow with space space space space space PCl subscript 5 space space space space space space on top space straight C subscript 6 straight H subscript 5 COCl