5-(4-Pyridyl)-1,3,4-thiadiazol-2-amine
Wang, Yao; Wan, Rong; Han, Feng; Wang, Peng; Wang, Bin; Acta Crystallographica Section E 65 (2009) o1099–; doi:10.1107/S1600536809014470

data_2221588
_publ_section_title
;
 5-(4-Pyridyl)-1,3,4-thiadiazol-2-amine
;
_journal_coeditor_code           BH2224
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1099
_journal_paper_doi               10.1107/S1600536809014470
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C7 H6 N4 S'
_chemical_formula_moiety         'C7 H6 N4 S'
_chemical_formula_sum            'C7 H6 N4 S'
_chemical_formula_weight         178.22
_chemical_melting_point          543
_chemical_name_systematic
;
5-(4-Pyridyl)-1,3,4-thiadiazol-2-amine
;
_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'
_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                 106.52(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.794(3)
_cell_length_b                   10.686(2)
_cell_length_c                   10.477(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      9
_cell_volume                     1587.9(6)
_computing_cell_refinement       'CAD-4 EXPRESS (Enraf--Nonius, 1989)'
_computing_data_collection       'CAD-4 EXPRESS (Enraf--Nonius, 1989)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo,1995)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.971
_diffrn_measured_fraction_theta_max 0.971
_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  0.0421
_diffrn_reflns_av_sigmaI/netI    0.0928
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3203
_diffrn_reflns_theta_full        25.98
_diffrn_reflns_theta_max         25.98
_diffrn_reflns_theta_min         1.44
_diffrn_standards_decay_%        1
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  2
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.350
_exptl_absorpt_correction_T_max  0.9658
_exptl_absorpt_correction_T_min  0.9333
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>,  1968)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.491
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.242
_refine_diff_density_min         -0.308
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.003
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     217
_refine_ls_number_reflns         3023
_refine_ls_number_restraints     43
_refine_ls_restrained_S_all      0.999
_refine_ls_R_factor_all          0.1460
_refine_ls_R_factor_gt           0.0668
_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^)+(0.0435P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1183
_refine_ls_wR_factor_ref         0.1424
_reflns_number_gt                1516
_reflns_number_total             3023
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bh2224.cif
_cod_data_source_block           I
_cod_original_cell_volume        1587.9(5)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2221588
_cod_database_fobs_code          2221588