Domanda del libro di testo
Draw the product of the reaction of each of the following compounds with a base:
d.
1037
views
Ch. 17 - Reactions at the Alpha-Carbon
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
Capitolo 17, Problema 36a
Draw the product obtained by heating each pair of ketones in a basic solution.
a. 
Guida verificata passo dopo passo1
Step 1: Recognize that the problem involves the aldol condensation reaction, which occurs when ketones (or aldehydes) are treated with a base and heat. This reaction forms a β-hydroxyketone intermediate, which can dehydrate to form an α,β-unsaturated ketone as the final product.
Step 2: Identify the α-hydrogens in each ketone. These are hydrogens attached to the carbon adjacent to the carbonyl group. These hydrogens are acidic and can be deprotonated by the base to form an enolate ion.
Step 3: Write the enolate ion formation for one of the ketones. The base abstracts an α-hydrogen, leaving behind a negatively charged carbon adjacent to the carbonyl group. Represent this enolate ion using resonance structures to show delocalization of the negative charge.
Step 4: Show the nucleophilic attack of the enolate ion on the carbonyl carbon of the second ketone. This forms a new carbon-carbon bond, resulting in a β-hydroxyketone intermediate.
Step 5: Apply heat to the β-hydroxyketone intermediate. Heating promotes dehydration (loss of water), leading to the formation of an α,β-unsaturated ketone as the final product. Draw the structure of the product, ensuring the double bond is between the α and β carbons.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Ketones
Ketones are organic compounds characterized by a carbonyl group (C=O) bonded to two carbon atoms. They are commonly represented by the general formula R2C=O, where R can be any alkyl or aryl group. Understanding the structure and reactivity of ketones is essential for predicting the products formed during chemical reactions, especially under different conditions such as heating or in the presence of a base.
Video consigliato:
02:27
Name the ketone
Base-Catalyzed Reactions
Base-catalyzed reactions involve the use of a base to facilitate the reaction process, often by deprotonating a molecule to form a more reactive species. In the context of ketones, bases can promote reactions such as aldol condensation, where two ketones react to form a β-hydroxy ketone. Recognizing the role of the base is crucial for understanding the mechanism and the resulting products of the reaction.
Video consigliato:
01:57Base Catalyzed
Aldol Condensation
Aldol condensation is a reaction where two carbonyl compounds, typically aldehydes or ketones, react in the presence of a base to form a β-hydroxy carbonyl compound, which can further dehydrate to yield an α,β-unsaturated carbonyl compound. This reaction is significant in organic synthesis as it allows for the formation of larger, more complex molecules from simpler ones. Understanding this process is key to predicting the products when heating ketones in a basic solution.
Video consigliato:
09:51Crossed Aldol
Pratica correlata
Domanda del libro di testo
Draw the product of the reaction of each of the following compounds with a base:
b.
764
views
Domanda del libro di testo
What two carbonyl compounds are needed to synthesize each of the following compounds, using a Robinson annulation?
a.
847
views
Domanda del libro di testo
Draw the product of the reaction of each of the following compounds with a base:
c.
1176
views
Domanda del libro di testo
Which of the following compounds will decarboxylate when heated?
a.
b.
884
views
Domanda del libro di testo
Draw the product obtained by heating each pair of ketones in a basic solution.
b.
1014
views