Which of the following geometrical parameters represent the true molecular dimensions of benzene in — Hydrocarbons Chemistry Question

💡 Solution & Explanation

In the regular hexagonal planar structure of benzene, each $sp^2$ hybridized carbon imposes $120^{\circ}$ bond angles ($C-C-C$ and $H-C-C$). The completely delocalized $\pi$ system averages the $C-C$ bond length to exactly $1.39 \text{ \AA}$ (between single $1.54 \text{ \AA}$ and double $1.34 \text{ \AA}$). The $C-H$ bond lengths are standard $sp^2-s$ overlaps measuring $1.09 \text{ \AA}$.