## Dipole moments

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Joined: Sat Sep 14, 2019 12:17 am

### Dipole moments

When a molecule has "dipole moments" is that referring to the fact that one atom is more electronegative than the other thus leading the electrons to attract to the more electronegative atom? When drawing these structures, do the arrows represent this idea? Or do they represent something else?

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

### Re: Dipole moments

Yes, dipole moments is referring to the fact that one atom is more electronegative. The larger the difference in electronegativity, the larger the dipole moment. It is conventional to draw a dipole moment arrow from positive to negative.

Posts: 55
Joined: Sat Aug 17, 2019 12:15 am

### Re: Dipole moments

Yes, you are correct think about it in terms of the electron cloud and the polarizability of the molecule.

JohnWalkiewicz2J
Posts: 103
Joined: Thu Jul 11, 2019 12:17 am
Been upvoted: 1 time

### Re: Dipole moments

Yes, typically a molecule will have dipole moments if the electronegativity diffence between the two atoms are between 0.4-1.7. The arrows illustrate the direction in which the dipole moments occur. For instance, in a H-O bond, the arrow will be pointing towards the oxygen atom as it is more electronegative and is partially negative. Hope this helps!