Question

(CH3)3N is basic but (CF3)3N is not basic.

Answer 1

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(CH3)3 N is basic but (CF3)3 N is not basic. In (CH3)3 N the lone pair of N is concentrated on N and so it can act as an electron pair donor (Lewis base). However in (CF3)3 N, the electron density on n is decreased due to strongly electronegative F atom attached to C. Hence it cannot act as a Lewis base.