Question

Example of p-p bonding is -
(A) BF3 (B) SO2
(C) SO3 (D) All

Answer 1

The correct option to the above question is (b), which is SO₂ has pπ-pπ bonding.

Boron trifluoride (BF₃) -

• BF₃ molecules are formed by the bonding between the three sp₂ orbitals of Boron, and the p orbital of three Fluorine atoms.
• Boron trifluoride is a colorless gas with a pungent odor.

Sulfur dioxide (SO₂) -

• The sulfur has the hybridization of sp₂. Hence it has a lone pair and two bond pairs.
• The unpaired electrons are 3p and 3d hybridized orbitals hence forming pi bonding with the oxygen.

Sulfur trioxide (SO₃) -

• The hybridization of sulfur trioxide is sp₂, hence it does not form pπ-pπ bonding.
• It has three pairs of sulfur that make a double bond with one pair of all three atoms of oxygen near the sulfur atoms.