Question

Which one is not a ligand?

• A. $P{H}_3$
• B. $N{O}^{+}$
• C. $B{F}_3$
• D. $C{l}^{-}$

Answer 1

Answer: (C)

$B{F}_3$ is an electron deficient compound and acts as Lewis acid hence, it cannot donate a pair of electrons and does not act as ligand.