Moderate

All of the following compounds can exist in the form of cis and trans isomers EXCEPT?:

Correct answer: D. 1 -Pentene

  • A. 2-Butene
  • B. 2-Pentene
  • C. 1 -Bromo-2-chloropropene
  • D. 1 -Pentene

Explanation

A, B, and C all show compounds that are capable of showing cis-trans isomerism because of having double-bonded carbons and different groups attached to them. However, 1-pentene can not show cis-trans isomerism because even though it has double-bonded carbons, one of its sides has similar groups (Hydrogen atoms) attached.

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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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