electron domain geometry vs molecular geometry  [ENDORSED]

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

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anatorres1B
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electron domain geometry vs molecular geometry

Postby anatorres1B » Mon Jul 11, 2016 3:25 am

I was wondering why for certain molecules, electron domain geometry is different from molecular geometry?

Chem_Mod
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Re: electron domain geometry vs molecular geometry  [ENDORSED]

Postby Chem_Mod » Mon Jul 11, 2016 10:37 am

This is due to the presence of lone pairs. If there is no lone pair, all the electron domains form bonds and the electron domain geometry is the same as molecular geometry. However, if there is a lone pair, the lone pair doesn't form a bond and therefore doesn't contribute to the shape of the whole molecule.

EmilyLeibovitch2E
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Re: electron domain geometry vs molecular geometry

Postby EmilyLeibovitch2E » Thu Jul 14, 2016 9:31 pm

Just to clarify, for electron domain geometry should we count the lone pairs as bonds, for example, would AX2E2 be tetrahedral, or should we not include the lone pairs at all when looking at electron geometry and AX2E2 should be considered linear?

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Re: electron domain geometry vs molecular geometry

Postby Chem_Mod » Sun Jul 17, 2016 2:34 pm

lone pair electrons must be considered along with bonding electrons for electron geometry.


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