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Amines — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAmines2 Marks
Question
Explain the observed Kb order:
Et2NH > Et3N > EtNH2 in aqueous solution.
✓

Answer

Due to combination of +I effect, solvation effect and steric hindrance of ethyl group the basic strength of ethyl substituted amines in aqueous solution is as follows:
Et2NH > Et3N > EtNH2
As a stronger base has a higher Kb value, therefore, Kb value decreases in the order:
Et2NH > Et3N > EtNH2

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