Question

The geometry and the type of hybrid orbitals present about the central atom in $B{F}_3$ is

• A. Linear, $sp$
• B. Trigonal planar, ${sp}^2$
• C. Tetrahedral, ${sp}^3$
• D. Pyramidal, ${sp}^3$

Answer 1

The correct option is B

Trigonal planar, ${sp}^2$

We can do this question in two different ways, lets calculate electron pairs for $B{F}_3$. Here, B is our central atom, and we know that,

ep = $\frac{V+L+A-C}{2}$ = $\frac{6}{2}$ = 3

Therefore, the geometry will be trigonal planar.

Trigonal planar $\Rightarrow$ ${sp}^2$ hybridised

Or

Lets write electronic configuration for Boron.

$\Rightarrow$ ${sp}^2$ hybridisation $\Rightarrow$ Trigonal Planar