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### tetrahedral

Posted: 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?

### Re: tetrahedral

Posted: 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.

### Re: tetrahedral

Posted: 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.

### Re: tetrahedral

Posted: 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.

Much Joy,
Atul