Question

Number of $\pi -electrons$ in cyclobutadienyl anion $(C_4{H}_4{)}^{2-}$ is

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer 1

The correct option is C $6$

The structure of cyclobutadienyl anion is as
Thus, total number of $\pi -electrons$
$=2\times 2+2=6$.