Question:
Identify the strongest base among the following amines:
Identify the strongest base among the following amines:
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In general, alkylamines (e.g., ethylamine) are stronger bases than arylamines (e.g., aniline) due to the electron-donating effect of alkyl groups.
Updated On: Apr 6, 2025
- \( \text{C}_6\text{H}_5\text{NH}_2 \)
- \( \text{C}_2\text{H}_5\text{NH}_2 \)
- \( \text{C}_6\text{H}_5\text{NH}_2 \)
- \( \text{C}_6\text{H}_5\text{NH}_2 \)
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The Correct Option is B
Solution and Explanation
The strength of a base is determined by the electron-donating ability of the group attached to the nitrogen atom. In amines:
- The stronger the electron-donating group, the stronger the base.
- Alkyl groups (such as \( \text{C}_2\text{H}_5 \)) are electron-donating, increasing the electron density on nitrogen and making it a stronger base.
Thus, \( \text{C}_2\text{H}_5\text{NH}_2 \) (ethylamine) is the strongest base, as the ethyl group is more electron-donating compared to the phenyl group in \( \text{C}_6\text{H}_5\text{NH}_2 \) (aniline).
- The stronger the electron-donating group, the stronger the base.
- Alkyl groups (such as \( \text{C}_2\text{H}_5 \)) are electron-donating, increasing the electron density on nitrogen and making it a stronger base.
Thus, \( \text{C}_2\text{H}_5\text{NH}_2 \) (ethylamine) is the strongest base, as the ethyl group is more electron-donating compared to the phenyl group in \( \text{C}_6\text{H}_5\text{NH}_2 \) (aniline).
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