Exercise 4.7 and 4.9

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

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Kellina Tran 2I
Posts: 50
Joined: Sat Jul 22, 2017 3:00 am

Exercise 4.7 and 4.9

Postby Kellina Tran 2I » Thu Nov 16, 2017 2:47 am

I am confused as to why 4.7 is a trigonal pyramidal but 4.9 is not? I have a feeling it has something to do with electron repulsion, but I don't quite understand it fully.

Sara Sasaki 1K
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Joined: Fri Sep 29, 2017 7:05 am

Re: Exercise 4.7 and 4.9

Postby Sara Sasaki 1K » Thu Nov 16, 2017 4:21 am

Yeah, it has to do with electron repulsion! Since there are 2 lone pairs on Iodine in ICl3, the electron repulsions balance each other out so the shape remains T-shaped, as opposed to how Sulfur in SOCl2 has a single lone pair that repels the bonded electron pairs.

Christy Zhao 1H
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: Exercise 4.7 and 4.9

Postby Christy Zhao 1H » Thu Nov 16, 2017 5:32 pm

Since lone pairs have a greater electron repulsion than electrons in bonds, these lone pairs push the bonded atoms closer together.

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