Question
Number of $\pi$ -electrons in cyclobutadienyl anion $\left(\mathrm{C}_{4} \mathrm{H}_{4}\right)^{2-}$ is(a) 2(b) 4(c) 6(d) 8
Step 1
The structure is a four-membered carbon ring with two extra electrons due to the 2- charge. Show more…
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