- You recall from CH 334 the components of a double bond: the sigma component and the pi component. You can describe these in both valence bond terms (hybridization) and in MO terms.
Visualization: MOs of Ethylene
Visualization: Formation of π-bond from Atomic Orbitals
- You can name an alkene, including correct use where needed of E or Z designators. You understand why cis and trans are not universally applicaple.
- You know how to convert an alkene to an alkane by catalytic hydrogenation.
- You can rank alkene double bonds on the basis of stability, and understand how heats of hydrogenation can be used to measure alkene stability.
Visualization: Alkene Heats of Hydrogenation
- You can recognize and estimate the impact of strain on alkene stability
- You remember from CH 334 how to make alkenes by E1 or E2 eliminations from alkyl halides.
- You can extend your understanding of E1 and E2 eliminations from haloalkanes to acid-catalyzed dehydration of alcohols.
- You know the Zaitsev rule that governs most eliminations, and can recognize where (and why) exceptions occur to give Hoffmann elimination.
Visualization: the Hofmann reaction
Recommended end-of-chapter problems: 11-33, 11-34, 11-35, 11-41, 11-42, 11-45, 11-47, 11-52, 11-72.
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