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Elimination reaction

Organic Chapter 7 ppt

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Chapter 7 Structure and Synthesis of Alkenes Jo Blackburn Richland College, Dallas, TX Dallas County Community College District ? 2006, Prentice Hall Organic Chemistry, 6th Edition L. G. Wade, Jr. Chapter 7 * Introduction Hydrocarbon with carbon-carbon double bonds Sometimes called olefins Term derived from olefiant gas meaning ?oil-forming gas? Originates with early experiments and the oily appearance of alkene derivatives Chapter 7 Chapter 7 * Characteristics Among most important industrial compounds and found in many plants and animals Ethylene ? a.k.a. ethene largest volume industrial organic compound used to make polyethylene and others Pinene ? major component of turpentine ? paint solvent distilled from extracts of evergreen trees Chapter 7 Chapter 7 *

Organic Chapter 6 ppt

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Chapter 6 Alkyl Halides: Nucleophilic Substitution and Elimination Organic Chemistry, 6h Edition L. G. Wade, Jr. Chapter 6 * Classes of Halides Alkyl: Halogen, X, is directly bonded to sp3 carbon. Most reactions result from breaking of this bond. C ? X bond is polar (EN difference) C is slightly positive ? electrophilic (can be attacked by nucleophile) X can leave with electrons ? elimination X can be replaced with another functional group ? substitution Chapter 6 Chapter 6 * Classes of Halides Examples: CHCl3 ? chloroform (solvent) CHClF2 ? freon-22 (refrigerant) CCl3 ? CH3 ? 1,1,1-trichloroethane (cleaning fluid) CF3 ? CHClBr ? halothane (nonflammable anesthetic) Chapter 6 Chapter 6 * Classes of Halides Vinyl: X is bonded to sp2 carbon of alkene. Examples:

Chem Ch. 8

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8.1 Functional Group Transformation by Nucleophilic Substitution Nucleophilic substitution reactions of alkyl halides are related to elimination reactions in that the halogen acts as a leaving group on carbon and is lost as an anion. The carbon-halogen bond of the alkyl halide is broken heterolytically: the two electrons in that bond are lost with the leaving group. The most frequently encountered nucleophiles are anions, which are used as their lithium, sodium, or potassium salts. If we use M to represent lithium, sodium, or potassium, some representative nucleophilic reagents are Table 8.1 illustrates an application of each of these to a functional group transformation. The
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