Question

Which of the following has $p\pi -d\pi$ bonding?

• A. $N{O}_3^{-}$
• B. $S{O}_3^{2-}$
• C. $B{O}_3^{3-}$
• D. $C{O}_3^{2-}$

Answer 1

Answer: (B)

$S{O}_3^{2-}$ has three o-bonds and one $p\pi -d\pi$ bond. $S$ is $s{p}^3$ - hybridised and one of the $s{p}^3$ - hybrid orbitals is occupied by a lone pair of electrons.