Arrange the following in order of decreasing stability:
(I) 2,3-dimethyl-2-butene
(II) trans-2-butene
(III) cis-2-butene
(IV) 1-butene
Choose the most appropriate answer from the options given below:
II 
III 
IV
III 
II 
IV 
I 
III 
IV
III 
II 
I
Text Solution
Verified by ExpertsA
Alkene stability increases with the number of alkyl substituents (hyperconjugation/Zaitsev idea 
more-substituted alkenes are favored), so the tetrasubstituted alkene (I) is most stable; monosubstituted 1 butene (IV) is least. Between the disubstituted isomers, trans-2-butene (II) > cis-2-butene (III) due to less crowding across the double bond (consistent with trans having opposite groups/non-polar).
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems