Interpretation: To tell in which structure the cis-trans isomerism possible.
Concept Introduction: Stereoisomers are molecules that have the same number of carbon atoms but differ in the arrangement of atoms.
The two categories of stereoisomers are as follows:
- Cis-trans isomers
- Enantiomers
Answer to Problem 4STP
Correct answer: In 2-pentene, cis-trans isomerism is possible.
Explanation of Solution
Reason for the correct option:
The geometric isomers in which the atoms are joined in the same order are known as cis isomers while the isomers in which the arrangement of atoms is in a different order or on the opposite sides of the double bond are known as trans isomers.
The cis-trans isomerism in 2-pentene can be shown as follows:
Reasons for incorrect options: In 2-butane, propyne and benzene cis-trans isomerism is not possible. Thus, all other options stand incorrect.
Chapter 22 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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