It has a strong catalyst effect for the reactions of alicyclic and aliphatic isocyanates. In chemistry researchers made significant contributions to the understanding of alicyclic compounds and Benzene. Classified as a saturated higher alicyclic primary alcohol. Unsaturation show less activity in position 5 and alicyclic and aromatic rings show less potency. These results agreed with works of Markovnikov who discovered the isomerization of naphthenic (alicyclic) compounds. The placement of double bonds in many alicyclic compounds can be predicted with Bredt's rule. Alicyclic compounds may have one or more aliphatic side chains attached. Both saturated (alicyclic) compounds and unsaturated compounds exist as cyclic derivatives. An alicyclic compound is an organic compound that is both aliphatic and cyclic. Cyclononane is an alicyclic hydrocarbon consisting of a ring of nine carbon atoms.