Monday, March 14, 2016

VSEPR

Valence Shell Electron Pair Repulsion Theory (VSEPR) is used to predict the molecular shape of a molecule. Unlike a Lewis Dot Structure, VSEPR is in three dimensions, and thus, is more accurate; however, takes longer to find.


Image result for vsepr model example
Nitrogen trioxide 

The wedges and lines show that the bonds move towards or away form you, thus giving the bond it's 3-D shape. The shape of a molecule determines how it acts towards other molecules. The example given above is polar, so the molecule has a charge and reacts differently than a molecule that is non-polar would. Each shape also had a unique electron geometry, which depends on its number of electron domains around its central atom. The example is tetrahedral, because their is four electron domains around the nitrogen, three bonds and one pair.

More information found here and here.

2 comments:

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  2. Colton, I believe your post was very helpful. I like how you opened up your post describing the purpose of VSEPR and how it differs from Lewis Dot Structures. Next, I think you explained the picture on your post very well, showing how the wedges and lines display its 3D shape and polarity. Lastly, the first link you posted was very educational, showing all the different types of VSEPR models that allow you to compare them.

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