Molecular shape vs electron geometry

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

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JulieAljamal1E
Posts: 71
Joined: Fri Sep 28, 2018 12:24 am

Molecular shape vs electron geometry

Postby JulieAljamal1E » Sat Nov 17, 2018 7:39 pm

What is the difference when asked for molecular shape versus electron geometry?

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

Re: Molecular shape vs electron geometry

Postby Lily Benitez 2G » Sat Nov 17, 2018 9:15 pm

The molecular shape doesn't take to account the lone pairs found on the central atoms, and thus results in the shape being the same. While electron geometry does take this into account and we know that lone pairs have a higher electron density so this changes the shape completely.

AngelaZ 1J
Posts: 65
Joined: Fri Sep 28, 2018 12:23 am

Re: Molecular shape vs electron geometry

Postby AngelaZ 1J » Sat Nov 17, 2018 11:28 pm

The molecular shape looks at the bonded atoms only, while the electron geometry includes the bonded atoms and lone pairs.

MinaChoi_3H
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Molecular shape vs electron geometry

Postby MinaChoi_3H » Sat Nov 17, 2018 11:46 pm

Another thing to note is that sometimes the two will be the same, and sometimes they will have different shapes.

Ariel Cheng 2I
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Molecular shape vs electron geometry

Postby Ariel Cheng 2I » Sun Nov 18, 2018 10:03 am

An example would be AX3E. Its molecular geometry would be trigonal pyramidal but its electron geometry is tetrahedral. For those without lone pairs on the central atom such as AX4, both its molecular and electron geometry is tetrahedral.


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