Organic Chemistry - Alkyne Synthesis | E2: Geminal vs Vicinal Dihalides | 9.3 Organic Chemistry

Synthesis of Alkynes Chad provides a thorough lesson on Alkyne Synthesis (i.e. the preparation of alkynes). He shows how alkynes can be synthesized from either geminal dihalides or vicinal dihalides in two successive E2 elimination reactions using excess NaNH2 (sodium amide) as the base followed by protonation with water. He first reviews dehydrohalogenation of alkyl halides to form alkenes to then show that dihalides can undergo dehydrohalogenation twice to form alkynes. Chad includes a detailed mechanism for alkyne synthesis and explains why terminal alkynes are likely to form when using NaNH2. If you want all my study guides, quizzes, and practice exams, check out my premium course at https://www.chadsprep.com/organic-chemistry-youtube 00:00 Lesson Introduction 00:34 Review of Alkene Synthesis; E2 Elimination 01:29 Alkyne Synthesis; E2 Elimination of Geminal or Vicinal Dihalides 02:52 The Mechanism of Alkyne Synthesis https://www.chadsprep.com/ #organicchemistry #organicchemistrytutorial #alkynes