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Answer» N-methylmethanamine is a stronger BASE than methyl amine. This is because of the +I effect of the two methyl groups in N-methylmethanamine which increases the electron density on the N-atom making the CARBOCATION intermediate more STABLE. In methyl amine, there is only one methyl group. THUS, it has less electron density increase than N-methylmethanamine and hence the carbocation intermediate is less stable. We know, greater the stability of the intermediate stronger is the base. Thus, N-methylmethanamine is more stable than methyl amine. (This is the case when the COMPOUNDS are in gaseous phase)
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