The compound (SiH_3)_3N is expected to be - Vidyadip

MCQ

The compound $(SiH_3)_3N$ is expected to be

A
pyramidal and more basic than $(CH_3)_3N$
✓
planar and less basic than $(CH_3)_3N$
C
pyramidal and less basic than $(CH_3)_3N$
D
planar and more basic than $(CH_3)_3N$

✓

Answer

Correct option: B.

planar and less basic than $(CH_3)_3N$

b
The compound $\left( SiH _3\right)_3 N$ is planar and less basic than $\left( CH _3\right)_3 N$ because the lone pair of electrons on $N$ in $\left( SiH _3\right)_3 N$ are used in $p \pi- d \pi$ back bonding by $Si$ atom while such $p \pi- d \pi$ bonding is not possible in $\left( CH _3\right)_3 N$ due to absence of vacant $d$-orbital in carbon.

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