2-[3,4-Dibutoxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thienyl]-5-phenyl-1,3,4-oxadiazole
Li, Hai-lin; Zeng, Hai-su; Kang, Si-shun; Wang, Hai-bo; Acta Crystallographica Section E 64 (2008) o1419–; doi:10.1107/S1600536808020254

data_2219019
_publ_section_title
2-[3,4-Dibutoxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thienyl]-5-phenyl-1,3,4-oxadiazole
_journal_coeditor_code           HB2756
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1419
_journal_paper_doi               10.1107/S1600536808020254
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C28 H28 N4 O4 S'
_chemical_formula_moiety         'C28 H28 N4 O4 S'
_chemical_formula_sum            'C28 H28 N4 O4 S'
_chemical_formula_weight         516.60
_chemical_melting_point          421
_chemical_name_systematic
;
2-[3,4-Dibutoxy-5-(5-phenyl-1,3,4-oxadiazol-2-yl)-2-thienyl]-
5-phenyl-1,3,4-oxadiazole
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 93.77(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.6770(15)
_cell_length_b                   16.871(3)
_cell_length_c                   20.398(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      8
_cell_volume                     2636.2(9)
_computing_cell_refinement       'CAD-4 Software (Enraf--Nonius, 1989)'
_computing_data_collection       'CAD-4 Software (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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0256
_diffrn_reflns_av_sigmaI/netI    0.0842
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5100
_diffrn_reflns_theta_full        25.16
_diffrn_reflns_theta_max         25.16
_diffrn_reflns_theta_min         1.57
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  2h
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.164
_exptl_absorpt_correction_T_max  0.992
_exptl_absorpt_correction_T_min  0.953
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>,  1968)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1088
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.207
_refine_diff_density_min         -0.193
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         4722
_refine_ls_number_restraints     216
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1944
_refine_ls_R_factor_gt           0.0870
_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^)+(0.05P)^2^+1.9P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1586
_refine_ls_wR_factor_ref         0.2026
_reflns_number_gt                1918
_reflns_number_total             4722
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hb2756.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2219019
_cod_database_fobs_code          2219019