In organic chemistry, a cyclic organic compound is one in which a series of carbon atoms are connected together to form a loop or ring. Benzene is a well known example. An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with the exception of carbides, carbonates, carbon oxides and gases containing carbon. ... Benzene, also known as C6H6, PhH, and benzol, is an organic chemical compound which is a colorless and flammable liquid with a pleasant, sweet smell. ...