Chapter 14 Templates -...

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1 CHEM 2212: Fundamentals in Modern Organic Chemistry II Polyunsaturated Systems Examples:
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2 Specific Focus: Subcategories: 1.) Non­Conjugated: 2.) Cojugated:
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3 Subcategories (cont'd): Miscellaneous: Enones: Enynes:
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4 Nomenclature Review Exercise:
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5 How can we synthesize these types of conjugated diene systems? 1.) Thermal Cracking: 2.) Acid Catalyzed Double Dehydration:
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6 3.) E 2 Elimination:
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7 Properties of Conjugated Dienes: Compound Hybridization Bond Length (angstroms)
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8 Properties of Conjugated Dienes (cont'd): Measured Values: [See Table 14.1 for additional examples] Stability [Conjugated vs Non­conjugated]
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9 Stability Comparison of Various Types of Diene Systems:
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10 Improved Stability Explained: 1.) Valence Bond Theory: Static
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11 Molecular Orbital Theory: Dynamic
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12 Molecular Orbital Theory (cont'd):
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13 Possible Resonance Structures:
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OK, I understand why conjugated systems are more stable, but what practical applications are there for this information? Electrophilic Addition:
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This note was uploaded on 01/29/2012 for the course CHEM 234-54 taught by Professor Morrison during the Fall '09 term at University of Georgia Athens.

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Chapter 14 Templates -...

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