Questions  

Which of the following statement is false to trisilylamine?

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By Expert Faculty of Sri Chaitanya
a
Three sp2 orbitals are used for σ bonding giving a plane triangular structure 
b
The lone pair of electrons occupy a p-orbital at right angles to the plane triangle and this overlaps with empty p-orbitals on each of the three silicon atoms resulting in π bonding.
c
The N-Si bond length is shorter than the expected N-Si bond length.
d
It is a weaker Lewis base than trimethyl amine.
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detailed solution

Correct option is B

The lone pair of electrons occupy a p-orbital at right angles to the plane triangle and this overlaps with empty p-orbitals on each of the three silicon atoms resulting in π bonding statement is false for trisilylamine.

The bonding assertion is untrue for trisilylamine because the single pair of electrons occupies a p-orbital that is at an angle to the plane triangle and overlaps with unoccupied p-orbitals on each of the three silicon atoms.

Hence, option B is correct.
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