180degrees and lone pairs?

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SPandya1F
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Joined: Fri Sep 29, 2017 7:04 am
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180degrees and lone pairs?

Postby SPandya1F » Sun Nov 19, 2017 8:25 pm

In problem 4.1, the ball-and-shape model b is 180 degrees. The answer says "may contain lone pairs". If lone pairs affect the shape of the molecule, how can a molecule with lone pairs be 180 degrees (linear)?

Katie Lam 1B
Posts: 52
Joined: Fri Sep 29, 2017 7:06 am

Re: 180degrees and lone pairs?

Postby Katie Lam 1B » Sun Nov 19, 2017 8:31 pm

It could be trigonal bipyramidal with 3 lone pairs and a 180 degree bond angle.

mayapartha_1D
Posts: 50
Joined: Fri Sep 29, 2017 7:07 am

Re: 180degrees and lone pairs?

Postby mayapartha_1D » Sun Nov 19, 2017 9:01 pm

Yes, it could be trigonal bipyramidal! The lone pair electrons may balance each other out to make it possible.

Clement Ng
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Re: 180degrees and lone pairs?

Postby Clement Ng » Sun Nov 19, 2017 9:33 pm

The molecule may have an electron configuration of a square planar.

Yuting Zhu 3D
Posts: 17
Joined: Tue Oct 10, 2017 7:14 am

Re: 180degrees and lone pairs?

Postby Yuting Zhu 3D » Tue Nov 21, 2017 7:55 pm

The electron arrangement and the molecular shape are two different things since the molecular shape only considers atoms but not lone pairs.
The electron arrangement could be trigonal bipyramidal. But could it also be octahedral with four lone pairs? Can someone answer that for me?


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