Dense energetic salts of N,N′-dinitrourea (DNU)
Ye, Chengfeng; Gao, Haixiang; Twamley, Brendan; Shreeve, Jean’ne M.; New Journal of Chemistry 32 (2008) 317–; doi:10.1039/b712417a

data_7051805
_publ_section_title
;
 Dense energetic salts of N,N&#x2032;-dinitrourea (DNU)
;
_journal_issue                   2
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              317
_journal_paper_doi               10.1039/b712417a
_journal_volume                  32
_journal_year                    2008
_chemical_formula_moiety         'C1 H1 N4 O5, C2 H4 N3'
_chemical_formula_sum            'C3 H5 N7 O5'
_chemical_formula_weight         219.14
_chemical_name_common            'C H N4 O5, C2 H4 N3'
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 95.5300(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.6156(3)
_cell_length_b                   4.9837(2)
_cell_length_c                   10.3119(4)
_cell_measurement_reflns_used    4485
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      29.99
_cell_measurement_theta_min      2.68
_cell_volume                     389.55(3)
_computing_cell_refinement       'Bruker, 2006; SAINT+ v. 7.23a'
_computing_data_collection       'Bruker, 2006; SMART v. 5.632'
_computing_data_reduction        'Bruker, 2006; SAINT+ v. 7.23a'
_computing_molecular_graphics    'Bruker, 2003; XP, SHELXTL v. 6.14'
_computing_publication_material  'Bruker, 2001; XCIF, SHELXTL, v. 6.14'
_computing_structure_refinement  'Bruker, 2003; XL,SHELXTL v. 6.14''
_computing_structure_solution    'Bruker, 2003; XS, SHELXTL v. 6.14'
_diffrn_ambient_temperature      90(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker/Siemens SMART APEX'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0196
_diffrn_reflns_av_sigmaI/netI    0.0142
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            5716
_diffrn_reflns_theta_full        29.00
_diffrn_reflns_theta_max         29.00
_diffrn_reflns_theta_min         1.98
_exptl_absorpt_coefficient_mu    0.173
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.959
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS-2004/1 ; Bruker, 2004'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.868
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             224
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.191
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.5(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.091
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         1151
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.090
_refine_ls_R_factor_all          0.0266
_refine_ls_R_factor_gt           0.0255
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0393P)^2^+0.0795P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0655
_refine_ls_wR_factor_ref         0.0662
_reflns_number_gt                1114
_reflns_number_total             1151
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b712417a.txt
_cod_data_source_block           2a
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7051805