Fully and partially fluorinated flavone derivatives
Hori, Akiko; Naganuma, Kohei; Acta Crystallographica Section C 66 (2010) o256–o259; doi:10.1107/S0108270110013387

data_2017645
_publ_section_title
;
 Fully and partially fluorinated flavone derivatives
;
_journal_coeditor_code           FG3163
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o256
_journal_page_last               o259
_journal_paper_doi               10.1107/S0108270110013387
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C15 H6 F4 O2'
_chemical_formula_moiety         'C15 H6 F4 O2'
_chemical_formula_sum            'C15 H6 F4 O2'
_chemical_formula_weight         294.20
_chemical_name_systematic
;
5,6,7,8-tetrafluoro-2-phenyl-4<i>H</i>-1-benzopyran-4-one
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 94.635(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.5400(11)
_cell_length_b                   6.4742(10)
_cell_length_c                   23.920(4)
_cell_measurement_reflns_used    1813
_cell_measurement_temperature    100
_cell_measurement_theta_max      27.83
_cell_measurement_theta_min      2.78
_cell_volume                     1163.8(3)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEX2 (Bruker, 2006)'
_computing_data_reduction        'SAINT (Bruker, 2006)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.956
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device_type  'Bruker APEXII CCD area-detector'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0212
_diffrn_reflns_av_sigmaI/netI    0.0310
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            6192
_diffrn_reflns_theta_full        27.86
_diffrn_reflns_theta_max         27.86
_diffrn_reflns_theta_min         1.71
_exptl_absorpt_coefficient_mu    0.154
_exptl_absorpt_correction_T_max  0.9848
_exptl_absorpt_correction_T_min  0.9553
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.679
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.161
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         2654
_refine_ls_number_restraints     57
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0606
_refine_ls_R_factor_gt           0.0403
_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^)+(0.0373P)^2^+0.4193P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0865
_refine_ls_wR_factor_ref         0.0943
_reflns_number_gt                1979
_reflns_number_total             2654
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            fg3163.cif
_cod_data_source_block           II
_cod_original_cell_volume        1163.9(3)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2017645
_cod_database_fobs_code          2017645