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13.3: Synthesis of Alkenes

Last updated

Aug 9, 2023
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- 13.2.6: Structure and Bonding in Ethene- The $\pi$ Bond
- 13.3.1: Alkanes from Reduction of Carboxylates - Kolbe's Electrolytic method

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Alkenes are usually prepared from either alcohols or haloalkanes (alkyl halides), although there are several methods for creating alkenes.

Topic hierarchy

13.3.1: Alkanes from Reduction of Carboxylates - Kolbe's Electrolytic method
Sodium or potassium salt of a dicarboxylic acid on electrolysis gives an alkene.
13.3.2: Alkenes by Dehydration of Alcohols
Alkenes are usually prepared from either alcohols or haloalkanes (alkyl halides).
13.3.3: Alkenes from Aldehydes and Ketones - Wittig Reaction
The Wittig reaction or Wittig olefination is a chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (often called a Wittig reagent) to give an alkene and triphenylphosphine oxide.
13.3.4: Alkenes from Dehydration of Alcohols
One way to synthesize alkenes is by dehydration of alcohols, a process in which alcohols undergo E1 or E2 mechanisms to lose water and form a double bond.
13.3.5: Alkenes from Dehydrohalogenation of Haloalkanes
Alkenes can be obtained from haloalkanes (alkyl halides). These haloalkanes are usually bromo and iodo and less commonly, chloro derivatives
13.3.6: Alkenes from Hydrogenation of Alkynes
Alkenes can be easily obtained by hydrogenation of alkynes.
13.3.7: Prepartion of Alkenes
13.3.8: Zaitsev's Rule
Zaitsev's Rule can be used to predict the regiochemistry of elimination reactions.

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