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Which is more stable, cis- or trans- 1,3-di-(methylcarboxylate) cyclobutane ? Why?

Which is more stable, cis- or trans- 1,3-di-(methylcarboxylate) cyclobutane ? Why?

Grade:12

1 Answers

Arun
25750 Points
5 years ago
Dear student
 
Cis isomer is mpre stable than trans form.
It is because cyclobutane looks like a square piece of paper with a fold along the diagonal. If you add the methyl groups to the corners not on the fold, they can be both axial or both equatorial. The axial is the less stable conformation than diequatorial. If it is the trans compound, then it will have one axial and one equatorial. Just as two equatorial groups are more stable, only one equatorial group will be less stable.

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