2,6-Diamino-3,5-dinitropyrazine
Gilardi, Richard D.; Butcher, Ray J.; Acta Crystallographica Section E 57 (2001) o738–o740; doi:10.1107/S1600536801011734

data_2200550
_publ_section_title
;
 2,6-Diamino-3,5-dinitropyrazine
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o738
_journal_page_last               o740
_journal_paper_doi               10.1107/S1600536801011734
_journal_volume                  57
_journal_year                    2001
_chemical_formula_iupac          'C4 H4 N6 O4'
_chemical_formula_moiety         'C4 H4 N6 O4'
_chemical_formula_sum            'C4 H4 N6 O4'
_chemical_formula_weight         200.13
_chemical_name_common            2,6-diamino-3,5-dinitro-1,4-pyrazine
_chemical_name_systematic
;
2,6-diamino-3,5-dinitro-1,4-pyrazine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90.00
_cell_angle_beta                 100.77(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.0136(18)
_cell_length_b                   12.960(6)
_cell_length_c                   6.3936(13)
_cell_measurement_reflns_used    49
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      19.85
_cell_measurement_theta_min      2.31
_cell_volume                     733.7(4)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Siemens, 1994)'
_computing_data_reduction        'SHELXTL (Sheldrick, 1994)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       2\q/\w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .0000
_diffrn_reflns_av_sigmaI/netI    .0405
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            2526
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.30
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    .161
_exptl_absorpt_correction_T_max  .9805
_exptl_absorpt_correction_T_min  .9429
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   '(Wuensch & Prewitt, 1965)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.812
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             408
_exptl_crystal_size_max          .35
_exptl_crystal_size_mid          .28
_exptl_crystal_size_min          .12
_refine_diff_density_max         .299
_refine_diff_density_min         -.240
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     144
_refine_ls_number_reflns         2526
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          .0957
_refine_ls_R_factor_gt           .0642
_refine_ls_shift/su_max          .004
_refine_ls_shift/su_mean         .001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.1032P)^2^+0.2079P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .1868
_reflns_number_gt                1715
_reflns_number_total             2526
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            wn6029.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2200550
_cod_database_fobs_code          2200550