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MHT CET 2022 Chemistry question

ChemistryOrganic Chemistry - Some Basic Principles and TechniquesMHT CET 2022

Which among the following compounds does not exhibit cis-trans isomerism?

Answer: (A)

Solution

Geometrical (cis-trans) isomerism in alkenes requires that each doubly bonded carbon carries two different groups. In (a) one carbon carries two identical H atoms (and the other two identical R groups), so there is only one arrangement: no cis-trans isomerism.

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Question ID VK-093536