Are these cis/trans isomers? Why or why

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SUMMARY

The discussion centers on the criteria for identifying cis/trans isomers in molecular structures. Participants agree that the presence of substituents, such as -OH and -O groups, determines the classification of isomers. The rigidity of ring structures is emphasized as a critical factor, preventing rotation and thus defining the isomeric forms. The consensus is that for two molecules to be classified as cis/trans isomers, they must have restricted rotation around a double bond or within a ring system.

PREREQUISITES
  • Understanding of molecular geometry and isomerism
  • Familiarity with functional groups such as -OH and -O
  • Knowledge of ring structures in organic chemistry
  • Basic principles of stereochemistry
NEXT STEPS
  • Study the concept of stereoisomerism in organic compounds
  • Learn about the differences between geometric isomers and structural isomers
  • Explore examples of cis/trans isomers in cyclic compounds
  • Investigate the impact of substituent positioning on molecular properties
USEFUL FOR

Chemistry students, organic chemists, and educators seeking to deepen their understanding of isomerism and molecular structure classification.

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Are these cis/trans isomers? Why or why not?

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Let's hear your take on it first.
 


Yes, because the O and the OH can be switched. Because the ring structure can not be changed?
espen180 said:
Let's hear your take on it first.
 


Given two molecules, what is needed for them to be called cis/trans-isomers?
 

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