Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Tropone or 2,4,6-cycloheptatrien-1-one is an organic compound with some importance in organic chemistry as a non-benzenoid aromatic. The compound consists of a ring of seven carbon atoms with three conjugated alkene groups and a ketone group. The related compound tropolone(2-hydroxy-2,4,6-cycloheptatrien-1-one) has an additional alcohol (or an enol including the double bond) group next to the ketone. The tropone moiety can be found in biomolecules such as colchicine, stipitatic acid and hinokitiol.