JEE PYQ: P Block Elements Question 61
Question 61 - 2019 (12 Apr Shift 1)
The correct statement among the following is:
(1) $(\text{SiH}_3)_3\text{N}$ is planar and less basic than $(\text{CH}_3)_3\text{N}$.
(2) $(\text{SiH}_3)_3\text{N}$ is pyramidal and more basic than $(\text{CH}_3)_3\text{N}$.
(3) $(\text{SiH}_3)_3\text{N}$ is pyramidal and less basic than $(\text{CH}_3)_3\text{N}$.
(4) $(\text{SiH}_3)_3\text{N}$ is planar and more basic than $(\text{CH}_3)_3\text{N}$.
Show Answer
Answer: (1)
Solution
Due to backbonding of lone pair electrons of nitrogen into vacant d-orbitals of Si, trisilylamine $(\text{SiH}_3)_3\text{N}$ is planar. In trimethylamine $(\text{CH}_3)_3\text{N}$, there is no backbonding and hence it is more basic.
BETA
