Ch 3 oh hbr ch 4 cl 2 ch 3 cl hcl rearrangements abc

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CH 3 OH + HBr CH 4 + Cl 2 CH 3 Cl + HCl • Rearrangements A‐B‐C → A‐C‐B Some Example of Reaction Types
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7 Reaction Mechanisms 1. Electrophilic Addition: CH 2 CH 2 + HBr CH 3 CH 2 Br Polar reaction—electrophilic addition (followed by a nucleophilic addition) Ionic intermediates (carbocations) Two-step mechanism 2. Substitution reactions (uni and bi-molecular) 3. Free-Radical substitution 4. Elimination Reactions (we will discuss these in detail soon!) 2. Substitution Reactions: The S N 1 Reaction (substitution, nucleophilic, unimolecular)
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8 2. Substitution Reactions: The S N 2 Reaction (substitution, nucleophilic, bimolecular) with inversion of configuration What is the LUMO for the previous reaction? A: The lone pair on iodide B: The sigma bonding orbital on CH 3 I C: The sigma anti-bonding orbital on CH 3 I D: A π * orbital on CH 3 I
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9 Which of the following is correct? A: The Δ G˚ of the reaction depends on the reaction mechanism (path) B: The Δ G of the reaction depends on the mechanism (path) C: The Δ G˚ of reactions may be changed by adding a catalyst D: The bigger the Δ G˚ the faster the reaction. 3. Free Radical Substitution Reactions Reactions of radicals involve an electron pairing mechanism (in propagation and termination steps) Cl Cl h !
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