# Why is benzene nonpolar?

Nov 9, 2015

Benzene is nonpolar because it is a symmetrical molecule in which all the bond dipoles cancel.

#### Explanation:

The structure of benzene is

It is a flat molecule with the shape of a regular hexagon.

We could say that benzene is nonpolar because it is a hydrocarbon that contains only $\text{C-C}$ and $\text{C-H}$ bonds, and hydrocarbons are nonpolar.

But $\text{C}$ is slightly more electronegative than $\text{H}$ (by 0.35 units), so a $\text{C-H}$ bond is very slightly polar and has a small dipole moment.

However, each $\text{C-H}$ bond has a partner that points in exactly the opposite direction.

The bond dipoles cancel exactly, so benzene has a zero dipole moment.

This makes benzene a nonpolar molecule.