Lect25_1024 - Chapter 8 Alkenes and Alkynes II: Addition...

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Ch. 8 - 1 Chapter 8 Chapter 8 Alkenes and Alkynes II: Alkenes and Alkynes II: Addition Reactions Addition Reactions
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Ch. 8 - 2 CC E Nu E Nu + 1. Addition Reactions of Alkenes
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Ch. 8 - 3 1A. 1A. How To How To Understand Additions Understand Additions to Alkenes to Alkenes This is an addition reaction: E Nu added across the double bond CC E Nu E Nu + Bonds broken Bonds formed -bond -bond 2 -bonds
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Ch. 8 - 4 Since p bonds are formed from the overlapping of orbitals, electron clouds are above and below the plane of the double bond CC electron clouds
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Ch. 8 - 5 Electrophilic electron seeking C=C and C C bonds are particularly susceptible to electrophilic reagents (electrophiles) Common electrophile H + , X + (X = Cl, Br, I), Hg 2+ , etc.
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Ch. 8 - 6 In an electrophilic addition, the electrons seek an electrophile, breaking the bond, forming a bond and leaving a positive charge on the vacant p orbital on the adjacent carbon. Addition of B to form a bond provides an addition product
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Ch. 8 - 7 CC E Nu Nu E
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Ch. 8 - 8 2. Electrophilic Addition of Hydrogen Halides to Alkenes: Mechanism and Markovnikov’s Rule Mechanism
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Ch. 8 - 9
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Lect25_1024 - Chapter 8 Alkenes and Alkynes II: Addition...

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