Questions and Answers
What is the reaction of Alkene + HBr ROOR?
What is the result of Alkene + Hx?
What happens with Alkene + 1) O3 2) DMS?
What do you get from 1 Alkene + 1) OsO4 2) NaHSO3 H2O?
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What is the outcome of 2 Alkene + KMnO4 NaOH, cold?
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What reaction occurs with Alkene + 1) RCO3H 2) H3O+?
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What does Alkene + Br2, H2O yield?
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What is the result of Alkene + Br2?
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What happens when Alkene + H2 in the presence of Pt?
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What is the result of Alkene + 1) BH3 THF 2) H2O2, NaOH?
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What is the outcome of Alkene + 1) Hg(OAc)2 H2O 2) NaBH4?
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What is the product of Alkene + H3O+?
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Study Notes
Hydrohalogenation
- Hydrohalogenation with HBr in the presence of ROOR leads to anti-Markovnikov addition.
- Hydrohalogenation with HX follows Markovnikov's rule for product distribution.
Ozonolysis
- Ozonolysis involves breaking alkenes with O3 followed by reduction with DMS, resulting in carbonyl compounds.
Dihydroxylation
- Syn dihydroxylation can be achieved using OsO4 followed by NaHSO3 and water, allowing for two enantiomeric forms.
- Cold conditions with KMnO4 and NaOH also produce syn dihydroxylation with similar enantiomeric results.
Anti Dihydroxylation
- Anti dihydroxylation is performed using a peracid (RCO3H) followed by acidic work-up (H3O+), producing different stereochemistry.
Halohydrin Formation
- Reacting alkenes with Br2 and water results in halohydrin formation, yielding compounds containing both halogen and hydroxyl groups.
Bromination
- Bromination of alkenes exclusively involves the addition of Br2, which is an electrophilic addition.
Hydrogenation
- Hydrogenation of alkenes, using H2 in the presence of a platinum catalyst (Pt), converts double bonds into single bonds.
Hydroboration-Oxidation
- Hydroboration-oxidation employs BH3 in THF followed by hydrogen peroxide (H2O2) and NaOH, leading to anti-Markovnikov alcohols.
Acid-Catalyzed Hydration
- Acid-catalyzed hydration via H3O+ adds water across the double bond, producing alcohols.
- Oxymercuration-demercuration is conducted using Hg(OAc)2 with water followed by NaBH4, optimizing for Markovnikov addition in alcohol formation.
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Test your knowledge of addition reactions involving alkenes with these helpful flashcards. Learn about different processes like hydrohalogenation and ozonolysis. Perfect for organic chemistry students looking to reinforce their understanding.
