Which of the following statements are not true about trimethyl and trisilyl amine ?

Options

A. Triemthyl amine has a pyramidal shpae while trisilyl amine has a planar shape
B. Nitrogen atom in both trimethyl and trisilyl amines is in a state of `sp^(3)` and `sp^(2)` hybridization respectively
C. Lone pair of electrons present in p-orbitals of nitrogen in trisilyl amine form `p pi-d pi` bond with the vacant d-orbitals of silicon atom.
D. Trisilyl amine is more basic in comparision to trimethyl amine because of the availability of the lone pair of electrons on nitrogen atom.

Answer

D

Explanation

In Si we have d-orbitals. The lone pair of electrons of N in trisilylamine are transferred to d-orbitals of Si and they are no more available for donation. However in C we have no d orbitals. Hence in case of trimethyl amine, lone pari of electrons of N are always available for donation. As such, trimethyl amine is basic in nature while trisilyl amine is amphoteric in nature.