1057_RG_6_08 - Chem 1057 J. Walcott LEARNING STRATEGIES C...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 1057 J. Walcott LEARNING STRATEGIES CENTER Fall 2008 Review Guide #6 Lectures: 9/29/08 – 10/3/08: Chapters 4 and 5 I. Three types of Alkene Addition Reactions (continued from Review Guide #5) A. Syn-Anti Addition 1. Hydrohalogenation (add HX) 2. Hydration (add H-OH) B. Anti Addition 1. Halogenation (add Br 2 or Cl 2 ) 2. Halohydrin formation (add Br 2 or Cl 2 and water) 3. Oxymercuration - reduction (adds H-OR) C. Syn Addition 1. Hydrogenation – adds 2 H s 2. Hydroboration-oxidation – adds H and OH II. Alkene Addition Reactions (See Review Guide #5) A. Syn-Anti Addition 1. Addition of hydrogen halides - adds H and X (X = halogen atom) 2. Hydration of alkenes – adds H and OH (acid catalyzed) Know the overall transformation that occurs and the mechanism for this reaction. Because a carbocation intermediate is formed that is stabilized by hyperconjugation, the reaction is regioselective and follows Markovnikov s rule. There are better ways to add an H and –OH. Rearrangements: Alkene reactions that produce carbocations are subject to rearrangements – the movement of a single group to make a more stable carbocation. Since primary and methyl carbocations are unstable, rearrangements usually occur when secondary carbocations arrange to form
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/17/2008 for the course CHEM 3570 taught by Professor Ganem, b during the Fall '06 term at Cornell University (Engineering School).

Page1 / 2

1057_RG_6_08 - Chem 1057 J. Walcott LEARNING STRATEGIES C...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online