Form III of 2,2′,4,4′,6,6′‐hexanitroazobenzene (HNAB‐III) |
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Authors: | Mark A Rodriguez Charles F Campana A David Rae Edward Graeber Bruno Morosin |
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Abstract: | The crystal structure of form III of the title compound, HNAB systematic name: bis(2,4,6‐trinitrophenyl)diazene], C12H4N8O12, has finally been solved as a pseudo‐merohedral twin (monoclinic space group P21, rather than the orthorhombic space group C2221 suggested by diffraction symmetry) using a dual space recycling method. The significant differences in the room‐temperature densities of the three crystalline forms allow examination of molecular differences due to packing arrangements. An interesting relationship with the stilbene analog, HNS, is discussed. Interatomic separations are compared with other explosives and/or nitro‐containing compounds. |
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