Ch400Ch7LN3 - Molecular Structure and the VSEPR Model Lewis...

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Molecular Structure and the VSEPR Model • Lewis Structures are valuable because they __________________________________________ • But they tell you nothing about the overall 3-D shape or geometry. • As you may know, the actual geometric shape of a molecule is very important. • Many chemical or biochemical reactions will only take place if a molecule with the “right shape” is present. • Enzymes are extremely shape specific; they will only act as catalysts if the substrate has just the right shape. • Proteins are folded into a specific shape, denaturization destroys this shape, and thus destroys the proteins ability to function. So how can you predict the shapes of simple molecules? • The VSEPR (which stands for ____________________) Model was developed to predict molecular shapes. • The theory behind this model is that bonding electrons and nonbonding electrons want to be as far apart as possible to minimize repulsions. • Thus bond angles, the angle between the central atom and two bonded atoms, can be predicted.
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This note was uploaded on 06/25/2008 for the course CHEM 400-401 taught by Professor Dr.samples during the Fall '06 term at American River.

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Ch400Ch7LN3 - Molecular Structure and the VSEPR Model Lewis...

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