Lecture 16- Electrophilic additions

Lecture 16- Electrophilic additions - Lecture 15 Begin Ch....

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Unformatted text preview: Lecture 15 Begin Ch. 6: Reactions of Alkenes Electrophilic Additions Drawing more complex mechanisms : : : Announcements : : : Exam tonight!! 7:00 – 9:00 WEL 1.316 HW 4 due Thurs beg. Of class Exam 1 pickup L.D.O. CH 310/318M – Sp.2011 Alkene Stereoisomers/DOU • For alkenes with n double bonds, each of which can show cis,trans isomerism, 2 n stereoisomers are possible. • “Degree of unsaturation” • DOU: 1 degree of unsaturation for every set of 2H’s less than the corresponding alkane. One DOU can come from a π-bond or from a ring. Why do we use it? Tues 3.10.11 V. Patman 2 CH 310/318M – Sp.2011 Ch. 6 Structure and Reactivity Thurs 3.22.11 V. Patman 3 CH 310/318M – Sp.2011 Bond Strength C-H s bond ~98 kcal/mol C-C s bond ~ 85 kcal/mol C-C p bond ~ 66 kcal/mol Consider in ethylene: Which bond is the most reactive? Reaction Mechanisms • A reaction mechanism describes how a reaction occurs and explains the following:...
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This note was uploaded on 09/25/2011 for the course CH 318M taught by Professor Bocknack during the Spring '08 term at University of Texas.

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Lecture 16- Electrophilic additions - Lecture 15 Begin Ch....

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