Acetamide aniline nethyl amine dimethyl amine increasing order of badicity
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☜☆☞ Dimethylamine is more basic as it is a secondary amine and has two methyl groups directly attached to the nitrogen atom, compared to one methyl group in methylamine. Alkyl groups have an electron pushing effect as carbon is more electronegative than hydrogen, thus the nitrogen atom in dimethylamine is more delta negative than the nitrogen atom in methylamine as the electrons in the two C-N bonds are pushed towards the nitrogen atom. This means that the lone pair of electrons on the nitrogen atom is further away from the nucleus at a higher energy level due to the extra repulsion from the electrons in each C-N bond, thus the nitrogen atom is more capable at donating a pair of electrons/accepting a proton (H+ ion) so dimethylamine is a stronger base in solution, as more OH- ions are formed when the nitrogen atom accepts a proton (CH3NHCH3 + H2O -> CH3NH2CH3+ + OH-ion) causing the solution to be more alkaline as the pH is higher.
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HERE IS YOUR ANSWER..........
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☜☆☞ Dimethylamine is more basic as it is a secondary amine and has two methyl groups directly attached to the nitrogen atom, compared to one methyl group in methylamine. Alkyl groups have an electron pushing effect as carbon is more electronegative than hydrogen, thus the nitrogen atom in dimethylamine is more delta negative than the nitrogen atom in methylamine as the electrons in the two C-N bonds are pushed towards the nitrogen atom. This means that the lone pair of electrons on the nitrogen atom is further away from the nucleus at a higher energy level due to the extra repulsion from the electrons in each C-N bond, thus the nitrogen atom is more capable at donating a pair of electrons/accepting a proton (H+ ion) so dimethylamine is a stronger base in solution, as more OH- ions are formed when the nitrogen atom accepts a proton (CH3NHCH3 + H2O -> CH3NH2CH3+ + OH-ion) causing the solution to be more alkaline as the pH is higher.
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