cyclic compound

Benzene (C₆H₆), the simplest aromatic hydrocarbon, was first isolated in 1825 by English chemist Michael Faraday from the oily residues left from illuminating gas. In 1834 it was prepared from benzoic acid (C₆H

…structures in solution but form cyclic, or ring, structures in hemiacetal or hemiketal forms, respectively. As illustrated for glucose and fructose, the cyclic structures are formed by the addition of the hydroxyl group (―OH) from either the fourth, fifth, or sixth carbon atom to the carbonyl group at position 1…

These rings, which have alternating double and single bonds, are among the most important ligands in organometallic chemistry; the most common members of this group range from cyclobutadiene (C₄H₄) to cyclooctatetraene (C₈H₈). Their organometallic compounds include the metallocenes ferrocene and bisbenzenechromium and

…Chemistry for his work on ringed molecules, terpenes (a class of hydrocarbons found in the essential oils of many plants), and sex hormones.