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Alkynes

Alkynes. Which has the greatest overall bond strength in the 3 structures? a. C-C bond of ethane b. C=C of ethylene c. C  C of acetylene d. no difference. Addition of H-X to Alkynes Mechanism. Which resonance structure contributes more? a. right b. left c. ~ equal.

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Alkynes

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  1. Alkynes • Which has the greatest overall bond strength in the 3 structures? a. C-C bond of ethane b. C=C of ethylene c. CC of acetylene d. no difference

  2. Addition of H-X to AlkynesMechanism • Which resonance structure contributes more? a. right b. left c. ~ equal

  3. Hydration of AlkynesMechanism • What reaction does step 6 look like? • SN2 b. SN1 c. E1 d. E2 e. addition

  4. Hydration of AlkynesMechanism a. yes b. no

  5. Hydrogenation of Alkynes Based on what you know about hydrogenation, would you get a cis alkene, trans alkene, or a mixture? a. trans b. cis c. mixture

  6. How could the oxirane be synthesized from but-2-yne?

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