Cocrystals of 2,3,5,6-tetrafluorobenzene-1,4-diol with diaza aromatic compounds
Czapik, Agnieszka; Gdaniec, Maria; Acta Crystallographica Section C 66 (2010) o356–o360; doi:10.1107/S0108270110021736

data_2017732
_publ_section_title
;
 Cocrystals of 2,3,5,6-tetrafluorobenzene-1,4-diol with diaza aromatic
 compounds
;
_journal_coeditor_code           SU3047
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o356
_journal_page_last               o360
_journal_paper_doi               10.1107/S0108270110021736
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C8 H6 N2 , C6 H2 F4 O2'
_chemical_formula_moiety         'C8 H6 N2 , C6 H2 F4 O2'
_chemical_formula_sum            'C14 H8 F4 N2 O2'
_chemical_formula_weight         312.22
_chemical_melting_point_gt       439
_chemical_melting_point_lt       441
_chemical_name_systematic
;
quinoxaline--2,3,5,6-tetrafluorobenzene-1,4-diol (1/1)
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2094(5)
_cell_length_b                   7.4290(4)
_cell_length_c                   23.585(13)
_cell_measurement_reflns_used    4532
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      4
_cell_volume                     1263.2(7)
_computing_cell_refinement       'CrysAlis CCD (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2004)'
_computing_data_reduction        'CrysAlis RED (Oxford Diffraction, 2004)'
_computing_molecular_graphics
;
ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae <i>et al.</i>,
2006)
;
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Kuma KM-4 CCD \k geometry'
_diffrn_measurement_method       \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  0.0374
_diffrn_reflns_av_sigmaI/netI    0.0249
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            6629
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         3.77
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.151
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.642
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.174
_refine_diff_density_min         -0.150
_refine_ls_extinction_coef       0.062(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         1324
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0332
_refine_ls_R_factor_gt           0.0306
_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^)+(0.0601P)^2^+0.0889P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0817
_refine_ls_wR_factor_ref         0.0837
_reflns_number_gt                1208
_reflns_number_total             1324
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su3047.cif
_cod_data_source_block           II
_cod_database_code               2017732
_cod_database_fobs_code          2017732