3,3'-Dinitro-4,4'-bipyridine
Wang, Yong; Xu, Jing-Yi; Li, De-Yong; Shi, Lu; Acta Crystallographica Section E 67 (2011) o1191–; doi:10.1107/S1600536811014139

data_2229916
_publ_section_title
;
 3,3'-Dinitro-4,4'-bipyridine
;
_journal_coeditor_code           BQ2296
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1191
_journal_paper_doi               10.1107/S1600536811014139
_journal_volume                  67
_journal_year                    2011
_chemical_formula_iupac          'C10 H6 N4 O4'
_chemical_formula_moiety         'C10 H6 N4 O4'
_chemical_formula_sum            'C10 H6 N4 O4'
_chemical_formula_weight         246.19
_chemical_name_systematic
;
3,3'-dinitro-4,4'-bipyridine
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.3580(19)
_cell_length_b                   17.815(4)
_cell_length_c                   6.3870(13)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      9
_cell_volume                     1064.8(4)
_computing_cell_refinement       'CAD-4 Software (Enraf--Nonius, 1985)'
_computing_data_collection       'CAD-4 Software (Enraf--Nonius, 1985)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXS97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Enraf--Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0423
_diffrn_reflns_av_sigmaI/netI    0.0478
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       0
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            2089
_diffrn_reflns_theta_full        25.42
_diffrn_reflns_theta_max         25.42
_diffrn_reflns_theta_min         2.29
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  2
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.123
_exptl_absorpt_correction_T_max  0.9878
_exptl_absorpt_correction_T_min  0.9758
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>, 1968)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.536
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.184
_refine_diff_density_min         -0.220
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.004
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         1071
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0878
_refine_ls_R_factor_gt           0.0550
_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^)+(0.0750P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1245
_refine_ls_wR_factor_ref         0.1412
_reflns_number_gt                679
_reflns_number_total             1071
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bq2296.cif
_cod_data_source_block           I
_cod_database_code               2229916
_cod_database_fobs_code          2229916