The Crystal Structure of Trifluoroethyl Tetryl.
NAVAL ORDNANCE LAB WHITE OAK MD
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The crystal structure of trifluoroethyl tetryl N-beta,beta,beta-trifluoroethyl-N,2,4,6-tetranitroaniline has been determined by X-ray diffraction. The unit cell is orthorhombic a 12.01, b 11.87, c 9.41 A, space group Pna21 with four molecules per cell. The nitramine group is rotated 86 deg out of the plane of the benzene ring and the 2-,4- and 6-nitro groups are rotated 19 deg, 12 deg and 39 deg respectively. The non-coplanarity of the 4-nitro group is due to intermolecular crowding but the other groups are configured to avoid both short intermolecular and short intramolecular distances between oxygen and fluorine atoms. Author