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Lone Pair distortion

Posted: Mon Nov 19, 2018 11:22 am
by Rian Montagh 2K
Why does a long pair cause the bond angle to be slightly less than the atom without a lone pair?

Re: Lone Pair distortion

Posted: Mon Nov 19, 2018 11:27 am
by Andrew Sun 1I
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.

Re: Lone Pair distortion

Posted: Mon Nov 19, 2018 12:38 pm
by Fanny Lee 2K
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