Dipole-Dipole

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Alvaro Chumpitaz 4D
Posts: 56
Joined: Wed Sep 11, 2019 12:17 am

Dipole-Dipole

Postby Alvaro Chumpitaz 4D » Sun Nov 17, 2019 9:33 am

Im still having a bit of trouble on how to identify dipole moments from a chemical formula? How do you know there are dipole-dipole forces?

Sahil Jog 1F
Posts: 126
Joined: Thu Jul 11, 2019 12:16 am

Re: Dipole-Dipole

Postby Sahil Jog 1F » Sun Nov 17, 2019 10:06 am

It is particularly difficult to deduce dipole moments by looking at a chemical formula. It would be much more helpful if you drew out the Lewis structure of the molecule and utilizing electronegativity to figure out where the electrons or negative dipole are pulled towards. This would help you understand if a molecule has dipole forces in the first place.

MMckinney_4H
Posts: 61
Joined: Sat Sep 28, 2019 12:16 am

Re: Dipole-Dipole

Postby MMckinney_4H » Sun Nov 17, 2019 10:12 am

What creates the actual dipole is the arrangement of the atoms in the molecule. So, looking at the molecular formula itself is of little help. You should draw out the lewis structure of the molecule and look at the electronegativity difference between atoms that are bonded to each other. This will give you a good idea of whether or not the molecule is dipole. If you have two dipole molecules, you will have dipole-dipole forces.


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