Identify the species having one \(\pi\)-bond and maximum number of canonical forms from the following :
Show Hint
- \(\mathrm{SO_3}\)
- \(\mathrm{O_2}\)
- \(\mathrm{SO_2}\)
- \(\mathrm{CO_3^{2-}}\)
The Correct Option is D
Solution and Explanation
\(\mathrm{SO_2}\): drawn with two S=O double bonds, i.e. two \(\pi\)-bonds.
\(\mathrm{SO_3}\): drawn with three S=O double bonds, i.e. three \(\pi\)-bonds (3 canonical forms).
\(\mathrm{CO_3^{2-}}\): one C=O \(\pi\)-bond in each structure, with the double bond placed on any of the three oxygens, giving 3 canonical forms.
So the species with one \(\pi\)-bond and the maximum (3) canonical forms is \(\mathrm{CO_3^{2-}}\).
Answer: (4) \(\mathrm{CO_3^{2-}}\)
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