Question

Among the following compounds of boron, the species which also forms $\pi -bond$ in addition to $\sigma -bonds$ is:

• A. $B{H}_3$
• B. $B_2{H}_6$
• C. $B{F}_3$
• D. $B{F}_4^{-}$

Answer 1

Answer: (C)

$B{F}_3$

$B{F}_3$ can form $\pi$ bond also in addition to $\sigma$ bond. As F is more electronegative and octate of B is not complete.