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Q.

Select the correct statements about the given compound:

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a

Ha is abstracted by bromine radical rapidly.

b

Hb is abstracted by bromine radical rapidly.

c

Hb is more acidic than Hc

d

Hb is less acidic than Hc

answer is A, C.

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Detailed Solution

Ha and Ho both are allylic but after removal by bromine, allylic radical at Hu is resonance stabilised with phenyl group. Hence Ha is abstracted readily.
(3) After removal of Hb, the carbanion thus formed is resonance stabilized since it is in conjugation with double bond.

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