Question

The correct statement regarding $S{O}_2$ molecule is:

• A. two $p\pi -d\pi$ bonds
• B. molecule has 2 lone pair, $2\sigma$ bonds and $2\pi$ bonds
• C. two $p\pi -p\pi$ bonds
• D. one $p\pi -p\pi$ bond and one $p\pi -d\pi$ bond

Answer 1

Answer: (D)

one $p\pi -p\pi$ bond and one $p\pi -d\pi$ bond

$S{O}_2$ molecule has one $p\pi -p\pi$ bond and one $p\pi -d\pi$ bond.

${SO}_2=6+6\left(2\right)=18e-16e=2e\to 1$ lone pair

$\to$ G.S.=[Ne]$3s^2$$3p^4$

2 Unpaired electron

$1^{st}$ E.S.$=\left[Ne\right]3s^{2}3p^{3}3d^1$

4 unpaired electron

$O\to 1s^{2}2s^{2}2p^4$

$\to$ Geometry of $S{O}_2$ is BENT/ANGULAR

$\to$ one $p\pi -p\pi$ and one $p\pi -d\pi$ Bond

$\to$ $2\pi$ Bonds

$\to$ $1$ lone pair on the central atom.