[CHM 112] Chapter 11 Question

[Andrew J. Pounds]

On 02/09/2016 12:35 PM, wrote:
>
> Hi Dr. Pounds,
>
> I was looking over chapter 11 and I am still confused on the 
> intermolecular forces.
>
> Could you please explain the difference between an induced dipole and 
> a regular dipole-dipole for interaction.
>
>
> Thanks!
>

So in a regular dipole-dipole interaction you have two molecules that 
are already dipoles.

Think about two CO molecules coming together -- that would be an example 
of a dipole-dipole interaction.


In an induced dipole you have either an ion, or a molecule that has a 
dipole, coming in close proximity to a molecule that is neither an ion 
or a dipole.

Think about CO coming in close proximity to Xenon.   The "more positive 
part" of the CO (near the carbon) attracts some of the electrons to one 
side of the Xenon atom and thus.  Since there is a small imbalance in 
the number of electrons in Xe (you may have some now closer to the C on 
the CO) you have "INDUCED" a small dipole on Xe.

-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://theochem.mercer.edu/pipermail/chm112/attachments/20160209/ec1ac1d2/attachment.html>