hexazine

Like benzene, it has been calculated that hexazine is likely an aromatic molecule.

In fact, it has been predicted computationally that the hexazine molecule is highly unstable.

The hexazine molecule bears a structural similarity to the very stable benzene molecule.

The two last members of this series, hexazine and pentazine, have not been observed, although all other members of the azine series have (such as pyridine, pyrimidine, pyridazine, pyrazine, triazines, and tetrazines).