2,5-Bis(4-pyridyl)-1,3,4-thiadiazole
Du, Miao; Zhao, Xiao-Jun; Li, Cheng-Peng; Acta Crystallographica Section E 60 (2004) o706–o707; doi:10.1107/S1600536804007202

data_2203460
_publ_section_title
;
 2,5-Bis(4-pyridyl)-1,3,4-thiadiazole
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o706
_journal_page_last               o707
_journal_paper_doi               10.1107/S1600536804007202
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          'C12 H8 N4 S'
_chemical_formula_moiety         'C12 H8 N4 S'
_chemical_formula_sum            'C12 H8 N4 S'
_chemical_formula_weight         240.28
_chemical_name_systematic
;
2,5-Bis(4-pyridyl)-1,3,4-thiadiazole
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 105.855(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.179(9)
_cell_length_b                   5.8223(17)
_cell_length_c                   7.169(3)
_cell_measurement_reflns_used    629
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.23
_cell_measurement_theta_min      3.59
_cell_volume                     1051.1(6)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT (Bruker, 1998)'
_computing_molecular_graphics    'DIAMOND (Brandenburg & Berndt, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       'Bruker SMART 1000'
_diffrn_measurement_method       \w
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0300
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            2924
_diffrn_reflns_theta_full        26.38
_diffrn_reflns_theta_max         26.38
_diffrn_reflns_theta_min         1.62
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.287
_exptl_absorpt_correction_T_max  0.9664
_exptl_absorpt_correction_T_min  0.9449
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.518
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             496
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.375
_refine_diff_density_min         -0.334
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.193
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     78
_refine_ls_number_reflns         1081
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.193
_refine_ls_R_factor_all          0.0625
_refine_ls_R_factor_gt           0.0424
_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^)+(0.0872P)^2^+0.0744P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1202
_refine_ls_wR_factor_ref         0.1464
_reflns_number_gt                854
_reflns_number_total             1081
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh6185.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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'NONE' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2203460
_cod_database_fobs_code          2203460