Acta Cryst. (2002). E58, o969-o971  [ doi:10.1107/S1600536802013570 ]

cis-2,4-Dinitro-6,8-dipropionyl-1H,5H-2,4,6,8-tetraazabicyclo[3.3.0]octane, a precursor of the energetic compound `bicyclo-HMX'

R. Gilardi, C. George and R. Evans

Abstract: The title compound, C₁₀H₁₆N₆O₆, belongs to a family of compounds that contain the tetraazabicyclo[3.3.0]octane ring system, and served as the precursor to the energetic material known as `bicyclo-HMX'. Both five-membered rings have envelope conformations, with methylene C atoms displaced from the respective C₂N₂ planes towards the endo side of the bicyclic system by 0.466  (3) and 0.315  (4)  Å for the dinitro- and dipropionyl-substituted rings, respectively. The dihedral angle formed by the C₂N₂ planes is 118.1  (1)°.

Online 9 August 2002

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