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Equatorial Priority

Posted: Fri Mar 11, 2016 4:18 pm
by Rhea Palsule
Do you determine which element substituent is prioritized to get the equatorial position in a chair conformation based on higher atomic number or higher atomic radius? For example with Br and Cl as substituents.

Re: Equatorial Priority

Posted: Fri Mar 11, 2016 4:58 pm
by Christine Rae 1I
The larger substituent will have a greater preference towards the equatorial position because it is more stable. For instance, in cis-1-propyl-3-methylcyclohexane, the propyl would be in the equatorial position because it is the larger and more bulky substituent, while the methyl would be in the axial position.

In your question, I believe the Br would be in the equatorial position.