# What is the difference between hexanes and cyclohexanes?

Jan 18, 2016

The general formula of hexanes is ${C}_{6} {H}_{14}$, the carbon chain is saturated (i.e. its formula is ${C}_{6} {H}_{14}$; ${C}_{n} {H}_{2 n + 2}$). Cyclohexane has a formula of ${C}_{6} {H}_{12}$, 2 less hydrogens than the saturated formula, and thus has ${1}^{\circ}$ of unsaturation.
Of course the extra $C - C$ bond in cyclohexane (which must be present to effect ring closure) has reduced the hydrogen count of the molecule.