Lect8_0907 - Ch. 3 - 1 3. Lewis Acids and Bases Lewis Acids...

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Unformatted text preview: Ch. 3 - 1 3. Lewis Acids and Bases Lewis Acids are electron pair acceptors Lewis Bases are electron pair donors In Lewis acidbase theory, the attraction of oppositely charged species is fundamental to reactivity Ch. 3 - 2 4. Heterolysis of Bonds to Carbon: Carbocations and Carbanions Carbocations are electron deficient. They have only six electrons in their valence shell, and because of this, carbocations are Lewis acids Ch. 3 - 3 4A. 4A. Electrophiles Electrophiles and and Nucleophiles Nucleophiles Because carbocations are electron- seeking reagents, chemists call them electrophiles (meaning electron- loving) Electrophiles are reagents that seek electrons so as to achieve a stable shell of electrons like that of a noble gas Ch. 3 - 4 Carbanions are Lewis bases A nucleophile is a Lewis base that seeks a positive center such as a positively charged carbon atom Ch. 3 - 5 5. How to Use Curved Arrows in Illustrating Reactions Curved arrows show the direction of electron flow in a...
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This note was uploaded on 02/20/2012 for the course CHEM 333 taught by Professor Lavigne during the Fall '09 term at South Carolina.

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Lect8_0907 - Ch. 3 - 1 3. Lewis Acids and Bases Lewis Acids...

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