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CGP EDU Academic Team
Published on: August 14, 2026
Give the Newman projection formula of the least stable staggered form of n–butane. Which of the following reasons is the causes of its unstability ?
(i) Vander–Waal’s strain
(ii) Torsional strain
(iii) Combination of both.
Text Solution
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Least stable staggered form of n–butane is
This is due to Vander Waal’s strain developed between the methyl groups at C 2 & C 3 . There is no torsional strain in the staggered form at torsional angle 60º.
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