How would you arrange the following amines in order of decreasing base strength?
#NH_3#
#CH_3NH_2#
#(CH_3)_2NH#
#NH_2Br#
1 Answer
I also get:
How I would explain it is by using
The more electron density around the nitrogen, the more it has available to donate to something else, and thus the more Lewis basic it becomes because a Lewis base donates electrons.
METHYLAMINE
The more electron density around the nitrogen, the more it has available to donate to something else, and thus the more Lewis basic it becomes because a Lewis base donates electrons.
Therefore, methylamine is more Lewis basic than ammonia.
DIMETHYLAMINE
Since
Therefore, dimethylamine is more Lewis basic than methylamine.
BROMOAMINE
For
Instead, we should recognize that
The
Thus, it weakens the Lewis basicity of the nitrogen relative to that in
#"NH"_3# .
RESULT
So, overall, we have: