Question

Specify the geometry and the hybridisation of N and B atoms in a 1:1 complex of $B{F}_3$ and $N{H}_3$.

• A. N is tetrahedral, $s{p}^3$ ; B is tetrahedral, $s{p}^3$
  
• B. N is pyramidal, $s{p}^3$ ; B is pyramidal, $s{p}^3$
  
• C. N is pyramidal, $s{p}^3$ ; B is planar,$s{p}^2$
  
• D. N is pyramidal, $s{p}^3$ ; B is tetrahedral $s{p}^3$

Answer 1

The correct option is A N is tetrahedral, $s{p}^3$ ; B is tetrahedral, $s{p}^3$


$N{H}_3+B{F}_3\to B{F}_3\leftarrow N{H}_3$
The structure of $N{H}_{3}andB{F}_3$ coordinated complex is given below.

So the hybridisation and geometry of both N and B will be $s{p}^3$, tetrahedral.