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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: sally on October 28, 2004, 08:59:01 PM

Title: cyclohexanes
Post by: sally on October 28, 2004, 08:59:01 PM

We are comparing Halogens and their change in free energy on flipping from the cyclohexane conformer with the equtorial and axial substituents.  Why is it that Bromine, being a smaller ion, has more free energy when switched from the equitorial to the axial position in a cyclohexane, than Iodine?

Title: Re:cyclohexanes
Post by: maxyoung on October 30, 2004, 02:17:51 AM

Is it becuase bromine is more electronegative than iodine, so the electron repulsion is more than that of iodine for the 1,3 diaxial repulsion?

Title: Re:cyclohexanes
Post by: Mitch on October 30, 2004, 11:27:57 PM

Do you mean Bromine has a more negative (delta)G?