Hydrocarbons - Result Question 34
####36. Correct order of stability is :
(a) cis -2-butene $>$ 1-butene $>$ trans -2-butene
(b) trans-2-butene $>$ cis-2-butene $>$ 1-butene
(c) 1-butene $>$ cis-2-butene $>$ trans-2-butene
(d) cis-2-butene $>$ trans-2-butene $>1$-butene
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Solution:
- (b)
CC=CC
Due to more hyper-conjugation in
$(6 \alpha-H$ atoms) than in 1-butene ( $2 \alpha-H$ atoms $)$, the former is more stable.
In trans-2-butene, the two methyl groups are for apart. Hence, it is most stable.
