The VSEPR Theory

Valence Shell Electron Pair Repulsion

• A set of rules for how to look at a Lewis structure,
• and to determine the 3D shape of a molecule;
• that have to do with the location of bonds;
• and lone electrons pairs.

VSEPR Model

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• Prediction of molecular shape;
• from knowledge of electron domains;
• as shown by the Lewis structure.
• (electron domain = bonding OR lone pairs)

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Concept 1: Electron Domains Repel Each Other

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Concept 2: Lone Pairs Need More Space than Bonding Pairs

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Concept 3: Multiple Bonds Need More Space than Single Bonds

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Molecular Geometry

2 Electron Domains

• http://www.youtube.com/watch?v=wQ3QfoD18ZE
• http://www.youtube.com/watch?v=_O08w3SQb0U
• http://www.youtube.com/watch?v=kk3BzLsaBUc
• http://www.youtube.com/watch?v=yRqPrgeRN4k
• http://www.youtube.com/watch?v=rlFCwd4CymE

3 Electron Domains

• http://www.youtube.com/watch?v=cuuBYMQuqr4
• http://www.youtube.com/watch?v=wFO_nB2zLhk
• http://www.youtube.com/watch?v=PzrTu3wB-OA
• http://www.youtube.com/watch?v=tdlyCKRoh6g
• http://www.youtube.com/watch?v=1eqaEYZY0GI

4 Electron Domains

• http://www.youtube.com/watch?v=uY66H9d7Uyw
• http://www.youtube.com/watch?v=EEGJUDuIP3w
• http://www.youtube.com/watch?v=7KW7p_OzioU
• http://www.youtube.com/watch?v=XSmjz9RVw7k
• http://www.youtube.com/watch?v=teW47np1fNU

5 Electron Domains

• http://www.youtube.com/watch?v=gJuHnT71OR0
• http://www.youtube.com/watch?v=-VvxNW7LQqM
• http://www.youtube.com/watch?v=aD_sZnI-Rh0
• http://www.youtube.com/watch?v=iu2SZRq_qHI
• http://www.youtube.com/watch?v=5Gmopt27Kkc

6 Electron Domains

• http://www.youtube.com/watch?v=xU0x0ESSbKg
• http://www.youtube.com/watch?v=BUL3cxVKjQ0
• http://www.youtube.com/watch?v=AcIjT5w3fus
• http://www.youtube.com/watch?v=4Iby8zexRW0