Dipoles

[Nicholas Kull_3L]

Can someone explain the dipole moments, induced dipole moments, and how they relate?

[LedaKnowles2E]

Dipole moments happen when one atom in a molecule is more polar than another, like H2O. Electrons are pulled toward O, the more electronegative atom. This gives the end of the molecule with O a slightly negative charge compared to the H ends.

Dipole-dipole attractions: this is when 2 polar molecules (like H2O) are attracted to each other because each molecule has a positive end and a negative end, so the positive end of one molecule is attracted to the negative end of the other.

Dipole-induced dipole: this is when you have a polar molecule and a neutral molecule. When they get close enough together, the negative end of the polar molecule repels the electrons in the neutral molecule, causing the neutral molecule to have a positive end and a negative end, called an induced dipole. At that point, the negative end of the polar molecule is attracted to the positive end of the previously neutral molecule.

[Megan_Ervin_1F]

I was wondering, does every molecule have a dipole moment?

[Anita Wong 1H]

in a non-polar molecule, the whole molecule has zero dipole moment but bonds are polar. When two non-polar molecules comes closer to each other, the negative part (electrons) of one molecule attract the positive part (nucleus) of another molecule. As a result, two dipoles are induced.