Skip to main content
Ch. 4 - Acids and Bases/Electron Flow
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMullins 1st EditionCh. 4 - Acids and Bases/Electron FlowProblema 63c
Capitolo 3, Problema 63c

Identify the stronger base in each pair. Explain your choice. Citing pKa values is not an acceptable answer.
(c) Chemical structures comparing two compounds, highlighting their differences in acidity and basicity.

Guida verificata passo dopo passo
1
Step 1: Understand the concept of basicity. A base is a substance that can accept a proton (H⁺). The strength of a base depends on its ability to stabilize the negative charge after accepting a proton. Factors such as electronegativity, resonance, and steric hindrance play a role in determining basicity.
Step 2: Analyze the molecular structure of each compound in the pair. Look for features such as the presence of electronegative atoms, resonance stabilization, or bulky groups that might affect the ability of the molecule to accept and stabilize a proton.
Step 3: Consider the role of resonance. If one of the bases has resonance structures that can delocalize the negative charge after accepting a proton, it will generally be a weaker base because the negative charge is more stabilized.
Step 4: Evaluate the electronegativity of the atoms involved. A base with a less electronegative atom holding the negative charge will generally be stronger because it is less able to stabilize the charge, making it more reactive.
Step 5: Assess steric hindrance. If one of the bases has bulky groups near the site where it would accept a proton, this can make it less accessible to the proton and therefore a weaker base.

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:
3m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Acidity and Basicity

Acidity refers to the tendency of a compound to donate protons (H⁺ ions), while basicity is the tendency to accept protons. The strength of a base is often related to its ability to stabilize the positive charge that results from protonation. Understanding the relationship between acids and bases is crucial for determining which compound in a pair is the stronger base.
Video consigliato:
06:21
Understanding the difference between basicity and nucleophilicity.

Resonance Stabilization

Resonance stabilization occurs when a molecule can be represented by multiple valid Lewis structures, allowing for the delocalization of electrons. A base that can stabilize its negative charge through resonance is generally stronger because it can distribute the charge over a larger area, making it less likely to re-protonate. This concept is essential for comparing the basicity of different compounds.
Video consigliato:
03:43
The radical stability trend.

Electronegativity

Electronegativity is the tendency of an atom to attract electrons towards itself. In the context of basicity, a less electronegative atom is more likely to donate its electrons, making it a stronger base. Understanding the electronegativity of atoms within the compounds being compared helps in predicting which will be the stronger base in a given pair.
Video consigliato:
1:47
Electronegativity
Pratica correlata
Domanda del libro di testo

Identify the stronger base in each pair. Explain your choice. Citing pKa values is not an acceptable answer.

(d)

770
views
Domanda del libro di testo

For the following acid–base pairs, (v) show a mechanism for the reaction; and (vi) draw a reaction coordinate diagram.

(f)

1099
views
Domanda del libro di testo

Identify the stronger base in each pair. Explain your choice. Citing pKa values is not an acceptable answer.

(a)

1161
views
Domanda del libro di testo

Identify the stronger acid in each pair. Explain your choice. Citing pKa values is not an acceptable answer.

(a)

1163
views
Domanda del libro di testo

Benzoic acid and phenol are insoluble in water. When sodium bicarbonate is added to the water, benzoic acid dissolves, but phenol does not. The addition of sodium hydroxide causes both to dissolve. On the basis of these observations, estimate the pKa of phenol. [The pKa of H2CO3 is 6.4.]

1799
views
Domanda del libro di testo

For the following acid–base pairs, (iii) predict the favored side of equilibrium; (iv) calculate Keq;

(h)

1266
views