Aromatic hydrocarbon

Aromatic Compounds contain a benzene ring.

>>The term "aromatic" is actually a more subtle designation than this. While most aromatic organic molecules of interest do, indeed, contain the 6-carbon benzene ring structure, many aromatics do not (e.g. furan, pyrimidine). The of being aromatic is bestowed upon any organic molecule whose atoms (usu. carbon) are sp2 hybridized and whose Pi electorns follow the "4n+2" Hueckel rule in number (for n=0,1,2...).