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Chapter 13: Alkynes

8/7/2019

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Reaction #1: Synthesizing alkynes by double dehydrohalogenation
-Turns Alkane with two halogen leaving groups into a alkyne using strong base (NH2) 
Note: Nasiri does not use "mineral oil" in her dehalogenations. 
For the second reaction (geminal dihalide), rather than using excess NaNH2 and heat, Nasiri writes two steps: 1.) 3 equivalents of NaNH2  2.) H2O
​

Reaction #2: Reduction of alkynes by catalytic hydrogenation
-Turns Alkyne into either an alkane, cis alkene, or trans alkene (depending on reagent)

Reaction #3/4: Halogenation and Hydrohalogenation of alkynes
Picture

Note: we can form a Grignard's reagent or Cuprate reagent from a haloalkene
Picture

Reaction #5: Addition of OH to alkyne
First Video = Markovnikov addition of OH and Acid-catalyzed tautomerization
Picture
Second Video = Anti-Markovnikov addition of OH and base-catalyzed tautomerization
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  • Home
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    • Organic Chemistry Che118A (Fall 2021) >
      • Che 118A Table of Contents
      • Che118A Introduction
      • Week One
      • Week Two
      • Week Three
      • Week Four
      • Week Five
      • Week Six
      • Spectroscopy Resources
      • Reactions after MT2
    • Organic Chemistry Che118B (Summer Session) >
      • Che 118B Table of Contents
      • Che118B Introduction
      • Reaction Summaries
      • Week One
      • Week Two
      • Week Three >
        • Lectures (Ch 14-15)
        • Practice Questions
      • Week Four >
        • Lectures (Ch 15-16)
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        • Lectures (Ch 17)
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      • Week six >
        • Lectures (Ch 18)
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    • Organic Chemistry Che118C (Quarter-based) >
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        • Chapter 19 (MT 1 part 1)
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