arrows&resonance

arrows&resonance - Chemistry 333 1 Curved Double...

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Chemistry 333 Fall 2010 1) Curved Double Headed arrow Denotes the movement of two electrons X Y X Y X Y X Y X Y Z X Y Z bond to LP LP to bond bond to bond breaking bonds making bonds making & breaking bonds X Y X Y X Y X Y X Y X Y X Y X Y Bond Breaking X Y X Y X Y X Y X Y X Y X Y X Y Bond Making Bond Making and Breaking X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z If the lone pair is used as a source, we will always draw it. If a lone pair is created in the reaction, we will always draw it.
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Chemistry 333 Fall 2010 Resonance: Some compounds can be assigned more than one good Lewis structure. The compound behaves experimentally like hybrids or molecular averages of the individual Lewis Structures. These molecules are called resonance hybrids. Note: Resonance always stabilizes a structure. C C C C C C H H H H H H C C C C C C H H H H H H C O O C O O H H Benzene Formate Ion - double headed arrow indicates resonance hybrids When is a particular Lewis Structure a significant contributor to a resonance hybrid?? 1.
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This note was uploaded on 02/10/2011 for the course CHEM 333 taught by Professor Lavigne during the Fall '09 term at South Carolina.

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arrows&resonance - Chemistry 333 1 Curved Double...

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