Acta Cryst. (2001). E57, o891-o892  [ doi:10.1107/S1600536801013915 ]

6,8-Dinitro-2,4-dioxa-6,8-diazabicyclo[3.3.0]octan-3-one

R. D. Gilardi and R. J. Butcher

Abstract: The title compound, C₄H₄N₄O₇, is a bicyclic carbonate ester of 1,3-dinitroimidazolidine-4,5-diol. It contains only C, H, N, and O, and has a remarkably high density of 1.953  Mg  m^-3, one of the top 12 densities in the CHNO realm. Such high densities are usually only observed in strained polycyclic ring compounds such as the nitrocubanes and hexanitrohexaazaisowurtzitane.

Online 31 August 2001

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