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Alkyne synthesis and reactions (3)

Organic chemistry: Electronegativity of alkyne carbons; acidity of alkynes; use of alkynyl anions as nucleophiles for SN2 reactions and for attack on oxacyclopropanes (epoxides). Alkyne synthesis from dihaloalkanes by double elimination; alkyne synthesis from alkenes by halogenation-double dehydrohalogenation. Hydrogenation of alkynes; hydrogenation of alkynes with Lindlar catalyst to form cis alkenes; sequential one-electron reduction of alkynes with sodium metal to form trans alkenes. Electrophilic addition of HX to alkynes; electrophilic addition of X2 to alkynes (halogenation). Enols; tautomerization; mercuric ion-catalyzed hydration of alkynes to form ketones This is a recording of a tutoring session, posted with the students' permission. These videos are offered on a "pay-what-you-like" basis. You can pay for the use of the videos at my website: http://www.freelance-teacher.com/videos.htm For a list of all the available video series, arranged in suggested viewing order, go to my website. For a playlist containing all the videos in this series, click here: http://www.youtube.com/watch?v=aaS9IyfB6wo&feature=PlayList&p=8A845EFD13FE3E1F&index=0&playnext=1 (1) Electronegativity of alkyne carbons. Acidity of alkynes (2) Use of alkynyl anions as nucleophiles for SN2 reactions and for attack on oxacyclopropanes (epoxides) (3) Continued. [8:00] Alkyne synthesis from dihaloalkanes by double elimination (4) Continued. Alkyne synthesis from alkenes by halogenation-double dehydrohalogenation (5) Continued. Hydrogenation of alkynes. Hydrogenation of alkynes with Lindlar catalyst to form cis alkenes. (6) Continued. Sequential one-electron reduction of alkynes with sodium metal to form trans alkenes (7) Continued. Electrophilic addition of HX to alkynes (8) Continued. Electrophilic addition of X2 to alkynes (halogenation). Enols; tautomerization (9) Continued. Mercuric ion-catalyzed hydration of alkynes to form ketones (10) Continued
Length: 11:00

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