MHT CET · Chemistry · Amines
Which among the following molecules has lowest \(\mathrm{p}^{\mathrm{Kb}}\) value?
- A \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{NH}_2\)
- B \(\left(\mathrm{CH}_3 \mathrm{CH}_2\right)_3 \mathrm{~N}\)
- C \(\left(\mathrm{CH}_3 \mathrm{CH}_2\right)_2 \mathrm{NH}\)
- D \(\mathrm{CH}_3 \mathrm{NH}_2\)
Answer & Solution
Correct Answer
(C) \(\left(\mathrm{CH}_3 \mathrm{CH}_2\right)_2 \mathrm{NH}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{CH}_3 \mathrm{NH}_2 < \mathrm{C}_2 \mathrm{H}_5 \mathrm{NH}_2 < \left(\mathrm{CH}_3 \mathrm{CH}_2\right)_3 \mathrm{~N} <\) \(\left(\mathrm{C}_2 \mathrm{H}_5\right)_2 \mathrm{NH} \)
\( \mathrm{pK}_{\mathrm{b}}=3.34 ; \mathrm{pK}_{\mathrm{b}}=3.29 ; \mathrm{pK}_{\mathrm{b}}=3.24 ;\) \(\mathrm{pK}_{\mathrm{b}}=3.0\)
\( \mathrm{pK}_{\mathrm{b}}=3.34 ; \mathrm{pK}_{\mathrm{b}}=3.29 ; \mathrm{pK}_{\mathrm{b}}=3.24 ;\) \(\mathrm{pK}_{\mathrm{b}}=3.0\)
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