Question

The compound $\left(S i H_{3}\right)_{3}N$ is expected to be

• A. pyramidal and more basic than $\left(C H_{3}\right)_{3}N$
• B. planar and less basic than $\left(C H_{3}\right)_{3}N$
• C. pyramidal and less basic than $\left(C H_{3}\right)_{3}N$
• D. planar and more basic than $\left(C H_{3}\right)_{3}N$

Answer 1

Answer: (B)

$\left(S i H_{3}\right)_{3}N$ is planar and less basic than $\left(C H_{3}\right)_{3}N$ because lone pair of N atom is used in $p\pi -d\pi $ back bonding with Si atom.