which molecules are aromatic
1 An aromatic molecule or compound is one that has special stability and properties due to a closed loop of electrons. 2  Not all molecules with ring (loop) structures are aromatic.3  A general scientific definition can be found below.or comparison, here are some molecules with ring structures that are not aromatic because they do not meet Hueckel'hÃ¼ckel S rule which requires that they have (2=n), 0 (6=n), 1 (10=n) 2 or (14=n) 3. etc-pi electrons in a: Ring MANY'pah s are extremely potent carcinogens or. mutagens