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Structure and bonding in beta-HMX-characterization of a trans-annular N...N interaction
Elizabeth A Zhurova1, Vladimir V Zhurov, A Alan Pinkerton
1Department of Chemistry, University of Toledo, Toledo, Ohio 43606, USA.
Abstract:
Chemical bonding in the beta-phase of the 1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane (HMX) crystal based on the experimental electron density obtained from X-ray diffraction data at 20 K, and solid state theoretical calculations, has been analyzed in terms of the quantum theory of atoms in molecules. Features of the intra- and intermolecular bond critical points and the oxygen atom lone-pair locations are discussed. An unusual N...N bonding interaction across the 8-membered ring has been discovered and characterized. Hydrogen bonding, O...O and O...C intermolecular interactions are reported. Atomic charges and features of the electrostatic potential are discussed.
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