Question

(CH3)3N is basic, but (CF3)3N is not basic explain

Answer 1

the tetra methyl amine is basic and (CF3)3N is not basic because in both of these the central metal atom is nitrogen which can donate electron but in (CF3)3N the F is more electronegative than N then F attracts the electrones of nitrogen and then nitrogen can't donate electrons but in (CH3)3N H is less electronegtive than N so H will not attract the electrones of N and then N can donate electrons.....
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Answer 2

In trimethylamine, we have the substituents as methyl groups, which are not that electronegative as compared to the substituent in (CF3)3N , because, obviously flourine is more electronegative than an alkyl group. Now in the former compound, the lone pair on N , can stay there, thus N here can donate lone pair acting as electron pair donor or lewis base. But in the second compound, due to high electronegativity of fluorine , the electron is attracted towards fluorine, making N less able to donate electron.

Now we know, that if an element can donate electron pair, than it can also become basic, and as explained above, only (CH3)3N is able to do that, making it basic, rather than (CF3)3N.


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