Which of the following statement(s) is/are correct?
A
Cyclopropane has a non-planar structure.
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B
Cyclobutane has a non planar structure.
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C
Cyclopentane has a non planar structure.
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D
Cyclopentane has a planar structure.
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Solution
The correct options are B Cyclobutane has a non planar structure. C Cyclopentane has a non planar structure. Cyclopropane is planar structure (all carbon atom in same plane) as shown below :
Cyclobutane is non planar structure and it has puckered like structure . Puckered conformation of cyclobutane which increases the angle strain but decreases the torsional strain until a minimum energy balance between the two opposing effects is reached. Cyclopentane is non planar structure and it has open envelope like structure.
Cyclopentane adopts a puckered, out of plane conformation that strikes a balance between increased angle strain and decreased torsional strain.