What are the structure of (1) N(SiH3)3 (2) {(Me)3Si}2N-Si(Me)3 (3) HN(SiH3)2 and give the Answers of following questions?

 

Q (1): which is greater x or y?
Q (2): which is greater x or z?
Q (3): which have greater extent of back Bonding?

SOLUTION:

Ans: (1): ‘y’ is greater than ‘x’ because of steric repulsion of -CH₃ group.

Ans: (2): “z’ will be greater because one lone pair going two places.

Ans; (3): the extant of back bonding is 3^rd >1^st > 2nd 

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