Question
Explain the structure of sulphur dioxide.
✓
Answer
$SO2$ molecule has a bent structure with an $O–S–O$ bond angle of $119^\circ .$
Sulphur is $sp2$ hybridised and the lone pair of electrons of sulphur reduces the bond angle from $120^\circ$ to $119^\circ .$
In the structure, each oxygen atom is attached to sulphur by an $\sigma$ and a $\pi$ bond.
The $\sigma$ bonds between $S$ and $O$ are formed by $sp^2–p$ overlap, while one of the $\pi$ bonds is formed from $p\pi – p\pi$ overlap and other from $p\pi –d\pi$ overlap.
Both $S–O$ bonds are identical because of resonance.
Sulphur is $sp2$ hybridised and the lone pair of electrons of sulphur reduces the bond angle from $120^\circ$ to $119^\circ .$
In the structure, each oxygen atom is attached to sulphur by an $\sigma$ and a $\pi$ bond.
The $\sigma$ bonds between $S$ and $O$ are formed by $sp^2–p$ overlap, while one of the $\pi$ bonds is formed from $p\pi – p\pi$ overlap and other from $p\pi –d\pi$ overlap.
Both $S–O$ bonds are identical because of resonance.
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