Naming Cyclohexene with E/Z Configuration

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SUMMARY

The naming of cyclohexene with E/Z configuration is determined by the positioning of the higher priority atoms around the double bond. In this case, the two CH2 groups are on the same side of the double bond, confirming that the compound is named as Z-cyclohexene. The mnemonic "Z - 'Zame' side" aids in remembering this configuration. It is noted that E-cyclohexene is unlikely to occur with only carbon and hydrogen due to steric hindrance.

PREREQUISITES
  • Understanding of E/Z nomenclature in alkenes
  • Familiarity with priority rules in stereochemistry
  • Basic knowledge of cycloalkenes
  • Concept of steric hindrance in organic compounds
NEXT STEPS
  • Study the Cahn-Ingold-Prelog priority rules for stereochemistry
  • Learn about the properties and reactions of cycloalkenes
  • Explore examples of E/Z isomerism in other alkenes
  • Investigate steric effects in organic chemistry
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Chemistry students, organic chemists, and anyone studying stereochemistry and alkene nomenclature will benefit from this discussion.

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How do we name cyclohexene with E/Z configuration?

This compound is symmetric w.r.t. the double bond.
 
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Abdul Quadeer said:
How do we name cyclohexene with E/Z configuration?

This compound is symmetric w.r.t. the double bond.

Consider the two atoms attached to each carbon of the double bond separately. Are the higher priority atoms on the same, or opposite sides of the double bond?
 
We have a C--C double bond and one CH2- group + H- atom on each carbon.
The two CH2- groups are on one side. So is it Z?
 
Yes, though in practice you are unlikely to get an (E) cyclohexene if all you have is carbon and hydrogen due to sterics.
 
An easy way to remember this (I use this method):

Z - "Zame" side

E - different sides
 
Yes, though in practice you are unlikely to get an (E) cyclohexene if all you have is carbon and hydrogen due to sterics.

Thanks!

Z - "Zame" side

Lol.
Thanks for that. I always had trouble rememebering them.
 

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