How many conformational isomers of butane are chiral?
A
2
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B
3
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C
4
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D
None.
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Solution
The correct option is D 2 Gauche butane has 2 enantiomeric chiral conformations, as it lacks a plane of symmetry. A molecule is achiral if it has plane of symmetry or a center of symmetry. Butane is an achiral molecule, but has two chiral conformational isomers.