Which of the following will have a meso isomer?

Cis-1, 2 dichlorocyclobutane

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2, 3 - dichlorobutane

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2,2-dichlorobutane

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2, 3-dimethylbutane

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Solution

The correct options are
A Cis-1, 2 dichlorocyclobutane
B 2, 3 - dichlorobutane

The compounds cis-1, 2 dichlorocyclobutane and 2, 3 - dichlorobutane contains a plane of symmetry. Hence, they are superimposable on their mirror images.

Thus, they have a meso isomer.

Options A and B are correct.

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