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usually, lone pairs will create some sort of dipole moment because lone pairs cause greater electron repulsion, resulting in uneven charges in the molecule. But if you're unsure, I'd draw the Lewis Structure to see exactly how the lone pairs line up
^^ to add on to that, dipole moments are created by lone pairs if the lone pairs don't cancel each other out, and one factor that can influence whether or not they cancel out is by looking at the bond angles
Yeah, mostly what I have seen shows that molecules with dipoles are usually polar, however, XeF4, which has lone pairs is actually non polar. So I would just recognize that usually it is heavily dependent on shape and structure. But more on your question, usually if there’s a lone pair, there’s probably a dipole.
Ethan Lam 4A wrote:If the lone pairs are on opposite sides then they cancel out. An example of this would be XeF4 since it is square planar and all the dipole movements from the Fs and electron pairs are negated.
So you need to know the molecular shape before figuring out if the lone pairs align to create a dipole moment?
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