Lecture25CHM233(10)final

Lecture25CHM233(10)final - Organic Chemistry, Third Edition...

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1 Organic Chemistry, Third Edition Janice Gorzynski Smith University of Hawai’i Chapter 10 Alkenes
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2 Which of the following reactions is an example of Markovnikov’s rule?
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3 Predict the product(s) of the following reaction.
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4 Predict the product(s) of the following reaction.
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5 Draw a mechanism to explain formation of the products in the below reaction
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6 Halogenation is the addition of X 2 (X = Cl or Br) to an alkene to form a vicinal dihalide. Halogenation – Electrophilic Addition of Halogen
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7 ―Decolorizing bromine‖ is the chemical test for the presence of a double bond. Unsaturation test
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• Halogens add to bonds because halogens are polarizable . • The electron-rich double bond induces a dipole in an approaching halogen molecule, making one halogen atom electron deficient and the other electron rich (X + X ). • The electrophilic halogen atom is then attracted to the nucleophilic double bond, making its addition possible. • The halogenation follows a different mechanism from that of hydrohalogenation or hydration. No rearrangements occur . Only anti addition of X 2 is observed. These facts suggest that carbocations are not intermediates. Halogenation Details
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This note was uploaded on 01/03/2012 for the course CHEM 233 taught by Professor Anamoore during the Fall '10 term at ASU.

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Lecture25CHM233(10)final - Organic Chemistry, Third Edition...

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