Regarding the allene molecule (), which of the following statements are chemically accurate? — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

The central carbon forms two $\sigma$ and two $\pi$ bonds, so it is $sp$ hybridized. Terminal carbons are $sp^2$ hybridized. Because the central $sp$ carbon uses perpendicular unhybridized p-orbitals to form the two $\pi$ bonds, the two $CH_2$ planes are perpendicular, meaning the hydrogens are NOT coplanar.