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Question

Which of the following biphenyl is optically active?


A

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B

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C

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D

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Solution

The correct option is A


Look at the above structure: due to steric hindrance arising due to the presence of bulkier groups at the corresponding (either) ortho-positions of benzene rings, the biphenyl system becomes non-planar i.e., optically active. As in, the two rings are not coplanar.


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