Bent molecular shapes (AX2E2)

(Polar molecules, Non-polar molecules, etc.)

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Bent molecular shapes (AX2E2)

Postby ramiro_romero » Fri Nov 15, 2019 10:28 pm

Why is it that molecules with AX2E2 VSEPR formula are bent with the electrons beside each other? For example, ClO2 is bent, but I'm wondering why the Lone pairs on Cl aren't opposite of each other. Instead, they are closer together and push the Oxygen atoms closer together. I don't understand why lone pairs on AX2E2 molecular shapes aren't completely opposite of each other.

Alexa Mugol 3I
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Re: Bent molecular shapes (AX2E2)

Postby Alexa Mugol 3I » Fri Nov 15, 2019 10:35 pm

This is because the electron geometry (geometry including the lone pair electrons) is tetrahedral. In a tetrahedral electron geometry, all the sites of electron density are next to each other; there aren't any spots where they can be opposite each other. This differs from square planar where the lone pairs are able to be opposite each other because there are actual spots in an octahedral electron geometry where they can be opposite each other.

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