<i>N</i>,<i>N</i>-Bis(2,6-difluorobenzyl)-1,3,4-thiadiazol-2-amine
Fun, Hoong-Kun; Liew, Wei-Ching; Chandrakantha, B.; Isloor, Arun M.; Acta Crystallographica Section E 65 (2009) o2166–o2167; doi:10.1107/S1600536809031675

data_2223213
_publ_section_title
;
 <i>N</i>,<i>N</i>-Bis(2,6-difluorobenzyl)-1,3,4-thiadiazol-2-amine
;
_journal_coeditor_code           TK2527
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2166
_journal_page_last               o2167
_journal_paper_doi               10.1107/S1600536809031675
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C16 H11 F4 N3 S'
_chemical_formula_moiety         'C16 H11 F4 N3 S'
_chemical_formula_sum            'C16 H11 F4 N3 S'
_chemical_formula_weight         353.34
_chemical_name_systematic
;
<i>N</i>,<i>N</i>-Bis(2,6-difluorobenzyl)-1,3,4-thiadiazol-2-amine
;
_space_group_IT_number           29
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2ac'
_symmetry_space_group_name_H-M   'P c 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
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   32.6678(6)
_cell_length_b                   5.85150(10)
_cell_length_c                   7.8140(2)
_cell_measurement_reflns_used    9387
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      33.67
_cell_measurement_theta_min      2.89
_cell_volume                     1493.69(5)
_computing_cell_refinement       'SAINT (Bruker, 2005)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material
;
SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.00(10)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
;
Bruker SMART APEXII CCD area-detector
;
_diffrn_measurement_method       '\f and \w'
_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  0.027
_diffrn_reflns_av_sigmaI/netI    0.032
_diffrn_reflns_limit_h_max       46
_diffrn_reflns_limit_h_min       -48
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            17980
_diffrn_reflns_theta_full        32.5
_diffrn_reflns_theta_max         32.5
_diffrn_reflns_theta_min         2.5
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.264
_exptl_absorpt_correction_T_max  0.965
_exptl_absorpt_correction_T_min  0.887
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(<i>SADABS</i>; Bruker, 2005)'
_exptl_crystal_colour            pale-yellow
_exptl_crystal_density_diffrn    1.571
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.23
_refine_diff_density_min         -0.26
_refine_ls_abs_structure_details 'Flack (1983), 1935 Friedel pairs'
_refine_ls_abs_structure_Flack   0.20(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.02
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         4796
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.02
_refine_ls_R_factor_all          0.040
_refine_ls_R_factor_gt           0.033
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0345P)^2^+0.2893P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.073
_refine_ls_wR_factor_ref         0.076
_reflns_number_gt                4299
_reflns_number_total             4796
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            tk2527.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_database_code               2223213
_cod_database_fobs_code          2223213