5. In each pair, which species is a stronger base? Justify your answer. F

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**Question 5: In each pair, which species is a stronger base? Justify your answer.**

**Molecular Structures:**

1. **First Pair:**
   - Left Structure: A secondary amine with an isopropyl group attached to the nitrogen.
   - Right Structure: A nitrogen anion with an isopropyl group attached, indicating a lone pair on nitrogen.

2. **Second Pair:**
   - Left Structure: An ester with a trifluoromethyl group attached to the carbonyl carbon, and a methoxy group on the other side.
   - Right Structure: An ether with an isopropyl group attached to the oxygen.

**Explanation:**

For the first pair, the species with the nitrogen anion is generally a stronger base than the neutral amine due to the presence of a negative charge on the nitrogen, which increases its electron-donating ability.

For the second pair, the ether (right structure) is expected to be a stronger base compared to the ester with the trifluoromethyl group. The electron-withdrawing effect of the fluorine atoms on the ester reduces its basicity, while the ether can donate electrons more readily.
Transcribed Image Text:**Question 5: In each pair, which species is a stronger base? Justify your answer.** **Molecular Structures:** 1. **First Pair:** - Left Structure: A secondary amine with an isopropyl group attached to the nitrogen. - Right Structure: A nitrogen anion with an isopropyl group attached, indicating a lone pair on nitrogen. 2. **Second Pair:** - Left Structure: An ester with a trifluoromethyl group attached to the carbonyl carbon, and a methoxy group on the other side. - Right Structure: An ether with an isopropyl group attached to the oxygen. **Explanation:** For the first pair, the species with the nitrogen anion is generally a stronger base than the neutral amine due to the presence of a negative charge on the nitrogen, which increases its electron-donating ability. For the second pair, the ether (right structure) is expected to be a stronger base compared to the ester with the trifluoromethyl group. The electron-withdrawing effect of the fluorine atoms on the ester reduces its basicity, while the ether can donate electrons more readily.
Expert Solution
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Bases are the substances that can donate OH- or accept H+. According to Lewis acid and base theory a base is the compound that can donate a lone pair of electron. 

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