lone pairs causing shape to be bent

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

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lone pairs causing shape to be bent

Postby Kiara1F » Tue Jul 12, 2016 8:20 pm

The Professor mentioned it in class..... but what is it exactly that makes the shape become bent when the lone pair is added to the top of the central atom? Is it the electron repulsion... and if so repulsion with the other bonds.. or?

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Re: lone pairs causing shape to be bent

Postby Chem_Mod » Wed Jul 13, 2016 6:42 am

Remember electons are there as lone pairs or in bonds. Electrons are charged so they prefer to be as far away from each other. So they will arrange themselves in a way such that all are as far away as possible from each other. Then consider the atom connections from the molecular shape.

Stefani Qonsul
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Re: lone pairs causing shape to be bent

Postby Stefani Qonsul » Mon Jul 18, 2016 12:16 am

As mentioned in step 4 of predicting molecular shape in the textbook, the molecule can distort so that lone pairs are as far apart from one another and from bonding pairs as possible.

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