PracticeQuestionsChap6

PracticeQuestionsChap6 - some cases). Br Br Br Br Br Br Br...

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1 Chem 2261 Checklist and Practice Questions for Chapter 6 ± Structure and Bonding in Alkynes ± Effect of hybridization on C-H bond strength. ± Effect of hybridization on C-H bond acidity. ± Alkyne Stability ± Reactions of Alkynes: ± Hydrogen Halide Addition ± Halogenation ± Conversion of alkynes to carbonyl compounds (aldehydes and ketones) ± Acid catalyzed addition of water (internal alkynes) ± Oxymercuration (terminal alkynes: oxygen on more substituted carbon; methyl ketone product) ± Hydroboration-Oxidation (terminal alkynes: oxygen on less substituted carbon; aldehyde product) ± Conversion of alkynes to alkenes ± Hydrogenation (H 2 , Lindlar catalyst) ± Reduction with Lithium (or Sodium) in Liquid Ammonia [Li, NH 3 (or Na, NH 3 )] ± Formation and Alkylation or Acetylide Anions ± Multi-Step Synthesis
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Practice Questions for Chapter 6 2 1. Indicate reagents and conditions for the following transformations (more than one step may be required in
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Unformatted text preview: some cases). Br Br Br Br Br Br Br Br O Br 2. Provide a mechanisms for the following reactions. HO OH H 2 SO 4 O O (a) H 2 O, H 2 SO 4 OEt OEt O (b) Practice Questions for Chapter 6 3 3. Give the major product for each of the following reactions. c) a) d) b) 2. HOOH, NaOH 1. R 2 BH H 2 SO 4 , HgSO 4 H 2 O 1. HBr, peroxide e) Br 2. HC C Na + 3. HBr (excess) 1. NaNH 2 2. H 3 C 3. H 2 , Lindlar catalyst I 1. HC C Na + 2. Br 2 (excess) 4. Indicate reagents and conditions for the following transformations. O O OCH 3 f) a) O b) c) e) d) Cl OCH 3 Practice Questions for Chapter 6 4 5. Suggest efficient reaction sequences for the preparation of each of the following compounds from the indicated starting materials and any other necessary reagents: from a) O and from b) and Br Br...
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PracticeQuestionsChap6 - some cases). Br Br Br Br Br Br Br...

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