Question

In $S{O}_3$ molecule, $3$ oxygen atoms are attached to sulphur atom through double bonds. Hence, the molecules consist $3\pi$- bonds. The types of pi-bonds present in $S{O}_3$ molecule are

• A. All $p\pi -p\pi$ bonds
• B. one $p\pi -d\pi$ and two $p\pi -p\pi$ bonds
• C. one $p\pi -p\pi$ and one $p\pi -d\pi$ bonds
• D. two $p\pi -d\pi$ and one $p\pi -p\pi$ bonds

Answer 1

Answer: (D)

In gas phase, $S{O}_3$ molecule is triangular planar having $s{p}^2$-hybridisation of the S-atom. There are three sigma bonds formed by $s{p}^2-p$ overlap and three pi-bonds are by one $p\pi -p\pi$ overlap and two $p\pi -d\pi$ overlap