Domanda del libro di testo
Predict the product of the Claisen reactions shown.
(b)
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Ch. 22 - Conjugated Systems 2: Pericyclic Reactions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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TOC.tableOfContents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases/Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes 1: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes 2: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification 1: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification 2: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution 1: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems 1: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems 2: Pericyclic Reactions54
- Ch. 23 - Benzene 1: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene 2: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Non è quello che usi tu?Cambia libro di testo
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Mullins 1st EditionCh. 22 - Conjugated Systems 2: Pericyclic ReactionsProblema 41c
Mullins 1st EditionCh. 22 - Conjugated Systems 2: Pericyclic ReactionsProblema 41cCapitolo 21, Problema 41c
Predict the product of the Claisen reactions shown.
(c) 
Guida verificata passo dopo passo1
Identify the reactants involved in the Claisen reaction. Typically, a Claisen condensation involves two ester molecules or an ester and a ketone.
Determine the base used in the reaction. Commonly, a strong base like sodium ethoxide (NaOEt) is used to deprotonate the alpha hydrogen of the ester.
Recognize the formation of the enolate ion. The base abstracts an alpha hydrogen from the ester, forming an enolate ion, which is a key intermediate in the Claisen condensation.
Consider the nucleophilic attack. The enolate ion acts as a nucleophile and attacks the carbonyl carbon of another ester molecule, leading to the formation of a tetrahedral intermediate.
Identify the final product. The tetrahedral intermediate collapses, resulting in the elimination of an alkoxide ion and forming a β-keto ester as the final product of the Claisen condensation.
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Claisen Condensation
Claisen condensation is a reaction where two esters or one ester and a ketone react in the presence of a strong base to form a β-keto ester or a β-diketone. The reaction involves the formation of an enolate ion from one of the ester molecules, which then attacks the carbonyl carbon of another ester, leading to the formation of a new carbon-carbon bond.
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08:28
Claisen Condensation
Enolate Ion Formation
Enolate ions are formed when a strong base deprotonates the α-hydrogen of an ester or ketone, resulting in a resonance-stabilized anion. This ion is nucleophilic and can attack electrophilic centers, such as the carbonyl carbon in Claisen condensation, facilitating the formation of new carbon-carbon bonds.
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02:26Formation of Enolates
Product Prediction in Claisen Reaction
Predicting the product of a Claisen reaction involves identifying the nucleophilic enolate ion and the electrophilic carbonyl carbon. The enolate ion attacks the carbonyl carbon, forming a new C-C bond and resulting in a β-keto ester or β-diketone. Understanding the structure of reactants and the mechanism helps in predicting the final product accurately.
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02:10Claisen-Schmidt Reaction
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