Question

Structures of $N(C{H}_3{)}_3$ and $N(Si{H}_3{)}_3$ are different. It is due to the fact that :

• A. silicon also uses d-orbitals in multiple bonding
• B. In case of $N(Si{H}_3{)}_3$, lone pair N-atom is transferred to the empty d-orbitals of silicon ($p\pi -d\pi$ overlapping)
• C. both (A) and (B)
• D. none of the above

Answer 1

The correct option is C both (A) and (B)

Si has vacant d-orbitals so in case of $N(Si{H}_3{)}_3$, lone pair N-atom is transferred to the empty d-orbitals of silicon ($p\pi -d\pi$ overlapping) so it has planar structure but there is no such bond in $N(C{H}_3{)}_3$