Top topic this week
Back to FAQs
Related FAQs
Frequently Asked Question
Questions asked by users might not always be phrased in the clearest way.
Compare the basicity of the following compounds: e) Benzoic acid derivatives: lithium benzoate (salt of lithium and benzoic acid). 4-lithium nitrobenzoate (lithium salt with nitrobenzoic acid). phenylacetylene (hc≡c−ph, acetylene hydrocarbon associated with the phenyl ring).
Accepted Answer
Basicity Comparison:
Lithium benzoate: This is a salt formed from the reaction of benzoic acid and lithium hydroxide. Benzoic acid is a weak acid, meaning its conjugate base, the benzoate ion, is a weak base. Therefore, lithium benzoate is a weak base.
4-Lithium nitrobenzoate: The nitro group (-NO2) is an electron-withdrawing group, meaning it pulls electron density away from the carboxylate group. This makes the conjugate base (4-nitrobenzoate) less stable and decreases its basicity. Hence, 4-Lithium nitrobenzoate is a weaker base than lithium benzoate.
Phenylacetylene: This compound is an alkyne with a phenyl group. While the triple bond can theoretically be protonated, it's not a strong base. The phenyl ring is weakly electron-donating, but this effect is not enough to make phenylacetylene a significant base.
Overall:
Lithium benzoate > 4-Lithium nitrobenzoate > Phenylacetylene
Lithium benzoate: This is a salt formed from the reaction of benzoic acid and lithium hydroxide. Benzoic acid is a weak acid, meaning its conjugate base, the benzoate ion, is a weak base. Therefore, lithium benzoate is a weak base.
4-Lithium nitrobenzoate: The nitro group (-NO2) is an electron-withdrawing group, meaning it pulls electron density away from the carboxylate group. This makes the conjugate base (4-nitrobenzoate) less stable and decreases its basicity. Hence, 4-Lithium nitrobenzoate is a weaker base than lithium benzoate.
Phenylacetylene: This compound is an alkyne with a phenyl group. While the triple bond can theoretically be protonated, it's not a strong base. The phenyl ring is weakly electron-donating, but this effect is not enough to make phenylacetylene a significant base.
Overall:
Lithium benzoate > 4-Lithium nitrobenzoate > Phenylacetylene
Articles you might like