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

Question

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

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

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - D
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.