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

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Postby KarlaArevalo2F » Sun Nov 11, 2018 7:49 pm

Im sorry, but can someone explain why a structure cannot be tetrahedral planar if it were planar and the angles were 90 degrees apart? Why isnt that a VSEPR shape?

Diviya Khullar 1G
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Joined: Fri Sep 28, 2018 12:19 am

Re: tetrahedral

Postby Diviya Khullar 1G » Sun Nov 11, 2018 8:03 pm

I'm not sure I understand what you are asking. The VSPER shape of an electron can be tetrahedral when there is a central atom with four things bonded to it. The angles in a tetrahedral are 109.5 degrees because the four atoms bonded to the central atom want to be as far from each other due to repulsion.

Rhea Churi 4K
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Joined: Fri Sep 28, 2018 12:28 am

Re: tetrahedral

Postby Rhea Churi 4K » Sun Nov 11, 2018 8:24 pm

It is because molecules exist in the 3d world. Because of that, the atoms want to be far from each other as possible because of electron repulsion so the bind angle is 109.5 degrees.

Atul Saha 3D
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Re: tetrahedral

Postby Atul Saha 3D » Sun Nov 11, 2018 8:35 pm

The bonds want to create the max amount of distance between them. With only two or three bonds, the bonds can be exist in a plane. With 4, the bonds have the angle of 109.5 degrees. VSEPR states that the lone pairs / bonds will repel each other, and hence the tetrahedral structure makes sense since 109.5 > 90.

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