Question

$M{g}_2{C}_3$ reacts with water to form propyne. $C_3^{4-}$ has:

• A. two sigma and two pi bonds
• B. three sigma and one pi bonds
• C. two sigma and one pi bonds
• D. two sigma and three pi bonds

Answer 1

The correct option is A two sigma and two pi bonds

${Mg}_2{C}_3+{4H}_{2}O⟶{Mg\left(OH\right)}_2+C_3{H}_4$ Propyne
$C_3^{4-}ion$

${[C\equiv C-C]}^{4-}$

$2\Pi$ Bonds

$2\sigma$ Bonds