Explain.

Asked by musira29rahman | 3rd Sep, 2019, 04:48: PM

Expert Answer:

A base is said to be strong base (tendency to donate electrons) has smaller pkb value.

 

As we know that aliphatic amines (R-NH2) are more basic as compared to aromatic amine (Ph-NH2 less availability of electrons due to resonance).

 

More the alkyl group are present on the nitrogen more the electron density increases on nitrogen.

 

Hence the correct decreasing order of pkb value of given compounds is:

C6H5NH2 > CH3NH2 > CH3NHCH3 > (CH3)3N

Answered by Ramandeep | 3rd Sep, 2019, 06:15: PM

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