Which of the following cyclopentane derivatives is optically inactive ?
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 B Option (b) has plane of symmetry. For a molecule to be optically active, it should not have plane of symmetry and centre of symmetry. Since, (b) has plane of symmetry it is optically inactive. Other given compounds does not have any of the plane of symmetry or centre of symmetry, hence they are optically active.