Domanda del libro di testo
Explain why an amide ion cannot be used to form a carbanion from an alkane in a reaction that favors products.
1058
views
Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis
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
Tutti i libri di testo
Bruice 8th EditionCh. 7 - The Reactions of Alkynes • An Introduction to Multistep SynthesisProblema 26a
Bruice 8th EditionCh. 7 - The Reactions of Alkynes • An Introduction to Multistep SynthesisProblema 26aCapitolo 7, Problema 26a
Which carbocation is more stable?
a. 
Guida verificata passo dopo passo1
Step 1: Analyze the stability of carbocations based on their structure. Carbocation stability is influenced by factors such as hyperconjugation, resonance, and inductive effects. Generally, tertiary carbocations are more stable than secondary, which are more stable than primary carbocations.
Step 2: Examine option A. The carbocation is allylic, meaning it is adjacent to a double bond. Allylic carbocations benefit from resonance stabilization, as the positive charge can delocalize over the π-system of the double bond.
Step 3: Examine option B. The carbocation is adjacent to a triple bond. However, sp hybridized carbons are less effective at stabilizing positive charges due to their high electronegativity, making this carbocation less stable.
Step 4: Examine option C. Similar to option B, the carbocation is adjacent to a triple bond. The same reasoning applies: sp hybridized carbons do not stabilize positive charges well, so this carbocation is also less stable.
Step 5: Examine option D. The carbocation is allylic and benefits from resonance stabilization, similar to option A. However, the additional hydrogen on the central carbon in D does not significantly affect the resonance stabilization compared to A. Both A and D are likely to be more stable than B and C.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
5mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Carbocation Stability
Carbocation stability is influenced by the degree of substitution at the positively charged carbon atom. Tertiary carbocations (three alkyl groups attached) are more stable than secondary (two alkyl groups) and primary (one alkyl group) due to hyperconjugation and inductive effects, which help to disperse the positive charge.
Video consigliato:
05:58
Determining Carbocation Stability
Hyperconjugation
Hyperconjugation is a stabilizing interaction that occurs when the electrons in a sigma bond (C-H or C-C) interact with an adjacent empty p-orbital of a carbocation. This interaction allows for the delocalization of the positive charge, enhancing the stability of the carbocation, particularly in more substituted carbocations.
Video consigliato:
04:28Understanding trends of alkene stability.
Inductive Effect
The inductive effect refers to the electron-withdrawing or electron-donating effects of substituents through sigma bonds. Alkyl groups are electron-donating, which can help stabilize a carbocation by reducing the positive charge through the inductive effect, making carbocations with more alkyl groups more stable.
Video consigliato:
01:47Understanding the Inductive Effect.
Pratica correlata
Domanda del libro di testo
Any base whose conjugate acid has a pKa greater than ______ can remove a proton from a terminal alkyne to form an acetylide ion (in a reaction that favors products).
1056
views
Domanda del libro di testo
Which of the following bases can remove a proton from a terminal alkyne in a reaction that favors products?
1091
views
Domanda del libro di testo
How could the following compounds be synthesized from acetylene?
c. CH3CH═CH2
1325
views
Domanda del libro di testo
Which carbocation is more stable?
b.
1291
views
Domanda del libro di testo
How could the following compounds be synthesized from acetylene?
b.
1188
views