Question

Bsc 2 nd year 4th sem chemistry...Why methylamine is much stronger than aniline

Answer 1

hey mate here is your answer may this will help you out :-)

Methyl amine is more base comparing with aniline ..Because:

In case of Anline the lone pair in Nitrogen atom participate with pi elctron in benzne and the delocalostion is happen in the lone pair….The elctron density in Nitrogen become less…That's why Nitrogen does not donate it electron pair to proton and Anline act as a less base….

In case of methyl amine(ch3Nh2) the reasonece is not possible and ch3 group has a +I effect ….which increase the electron dentistry in Nitrogen …As a result Nitrogen donate it electron pair to proton..That's why Methyl amine react as a strong base ..

THANK YOU…

Answer 2

here's the answer,

Aniline is a weak base. ... Traditionally, the weak basicity of aniline is attributed to a combination of inductive effect from the more electronegative sp2 carbon and resonance effects, as the lone pair on the nitrogen is partially delocalized into the pi system of the benzene ring.

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