Lone Pairs

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

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Celeste 1I
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Joined: Fri Sep 28, 2018 12:18 am

Lone Pairs

Postby Celeste 1I » Mon Nov 26, 2018 2:29 pm

Why is the shape of ICl3 t-shaped with the two lone pairs at the top? Why don't the lone pairs separate as far as they can from each other at the top and bottom like in IF4, the lone pairs are in complete opposite sides of the central atom?

Posts: 36
Joined: Fri Sep 28, 2018 12:25 am

Re: Lone Pairs

Postby 405161024 » Mon Nov 26, 2018 2:40 pm

because according to the VSEPR model that molecule is AX3E2 wich is T shape. If it helps think that the central atom has 5 electron density regions so the shape would be trigonal bipyramidal if all 5 were bonds but in this case you replace two of those with lone pairs and it gives yo the T shape.

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