Alkenes show geometrical isomers due to:
Correct answer: D. Restricted rotation around a double bond
- A. Asymmetry
- B. Rotation around a single bond
- C. Resonance
- D. Restricted rotation around a double bond
Explanation
The presence of a pi bond in a carbon-carbon double bond prevents free rotation around the bond axis. This restricted rotation is a necessary condition for the existence of geometric (cis-trans) isomerism.
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About Fundamental Principles of Organic Chemistry
Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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