Aromatic hexazine rings — [N₆]⁴⁻ — an all-nitrogen analogue of benzene, have finally been synthesized by researchers using high-pressure, laser-heated synthesis. The hexazine rings are present within a complex K₉N₅₆ structure containing [N₆]⁴⁻ and [N₅]⁻ rings as well as neutral nitrogen dimers.
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