Lone Pair distortion

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

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Rian Montagh 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Lone Pair distortion

Postby Rian Montagh 2K » Mon Nov 19, 2018 11:22 am

Why does a long pair cause the bond angle to be slightly less than the atom without a lone pair?

Andrew Sun 1I
Posts: 30
Joined: Fri Sep 28, 2018 12:18 am

Re: Lone Pair distortion

Postby Andrew Sun 1I » Mon Nov 19, 2018 11:27 am

A lone pair takes up more space in terms of it's electron cloud or density, so it'll push the other bonds closer together, resulting in a lower bond angle.

Fanny Lee 2K
Posts: 73
Joined: Fri Sep 28, 2018 12:29 am

Re: Lone Pair distortion

Postby Fanny Lee 2K » Mon Nov 19, 2018 12:38 pm

Bond angles will deviate from their ideal values according to the rule that lone pairs repel other electrons more strongly than bonding pairs. Being closer to the central atom causes lone-pairs take up more of the available 'bonding space'. Remember that lone-lone pair > lone-bonding pair > bonding-bonding pair


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