MWF_19 - Organic Lecture Series CH 310/318 M Textbook...

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Organic Lecture Series 1 CH 310/318 M LECTURE 19 Textbook Assignment: Chapter 6 Today’s Topics: Alkenes Alkenes -addition addition Rxns Rxns Notice & Announcements: XM 1 distribution today after class (in hallway) Organic Lecture Series 2 Reactions Reactions of Alkenes of Alkenes Chapter 6 Chapter 6
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Organic Lecture Series 3 – Carried out with either the pure reagents or in an inert solvent such as CH 2 Cl 2 . – Addition of bromine or chlorine to a cycloalkene gives a trans -dihalocycloalkane as a racemic mixture. – Addition occurs with anti anti stereoselectivity stereoselectivity; halogen atoms add from the opposite face of the double bond CH 3 CH=CHCH 3 Br 2 2 Cl 2 3 CH-CHCH 3 Br Br 2,3-Dibromobutane 2-Butene + 2 2 + trans- 1,2-Dibromocyclohexane (a racemic mixture) Cyclohexene + Br 2 Additions of Cl Additions of Cl 2 and Br and Br 2 Organic Lecture Series 4 Step 1: Formation of a bridged bromonium ion intermediate.
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This note was uploaded on 03/18/2012 for the course CH 310 M taught by Professor Iverson during the Spring '09 term at University of Texas at Austin.

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MWF_19 - Organic Lecture Series CH 310/318 M Textbook...

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