How can you identify cycloalkanes?

1 Answer
Apr 29, 2016

Cycloalkanes have 2 less hydrogens than the corresponding alkane.


A linear alkane has a formula of #C_nH_(2n+2)#. When the alkane is a ring, 2 LESS hydrogens are necessary because of the #C-C# ring junction. This so-called degree of unsaturation corresponds to a RING or a double bond. When you consider a formula, the degree of unsaturation should be one of the first parameters noted.

By way of example, compare hexane, #C_6H_14#, to cyclohexane, #C_6H_12#. The ring junction reduces the hydrogen count.