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Question:

The correct statement among the following is: (SiH3)3N is pyramidal and more basic than (CH3)3N; (SiH3)3N is planar and more basic than (CH3)3N; (SiH3)3N is pyramidal and less basic than (CH3)3N; (SiH3)3N is planar and less basic than (CH3)3N

(SiH3)3N is planar and more basic than (CH3)3N

(SiH3)3N is pyramidal and less basic than (CH3)3N

(SiH3)3N is planar and less basic than (CH3)3N

(SiH3)3N is pyramidal and more basic than (CH3)3N

Solution:

In case of (CH3)3N, nitrogen is sp3 hybridized and pyramidal in shape and no back-bonding i.e. more basic. In case of (SiH3)3N, nitrogen is sp2 hybridized and planar due to back bonding and less basic because the lone pair is not available for donation.