10-(4-Fluorobenzylidene)anthrone
Wei Zhou; Weixiao Hu; Luping Lv; Chunnian Xia; Acta Crystallographica Section E 61 (2005) o592–o593; doi:10.1107/S1600536805002655

data_2205197
_publ_section_title
;
 10-(4-Fluorobenzylidene)anthrone
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o592
_journal_page_last               o593
_journal_paper_doi               10.1107/S1600536805002655
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C21 H13 F O'
_chemical_formula_moiety         'C21 H13 F O'
_chemical_formula_sum            'C21 H13 F O'
_chemical_formula_weight         300.31
_chemical_name_systematic
;
10-(4-Fluorobenzylidene)anthrone
;
_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
_cell_angle_beta                 109.79(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.044(6)
_cell_length_b                   11.398(3)
_cell_length_c                   13.820(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      12.67
_cell_measurement_theta_min      11.14
_cell_volume                     1488.7(11)
_computing_cell_refinement       'CAD-4 EXPRESS'
_computing_data_collection       'CAD-4 EXPRESS (Enraf--Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo 1995)'
_computing_molecular_graphics
'ORTEP-3 for Windows (Version 1.05; Farrugia, 1999)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0115
_diffrn_reflns_av_sigmaI/netI    0.0148
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            3137
_diffrn_reflns_theta_full        25.17
_diffrn_reflns_theta_max         25.17
_diffrn_reflns_theta_min         2.15
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.183
_refine_diff_density_min         -0.139
_refine_ls_extinction_coef       0.0058(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         2673
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0506
_refine_ls_R_factor_gt           0.0333
_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^)+(0.0525P)^2^+0.247P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0934
_refine_ls_wR_factor_ref         0.1032
_reflns_number_gt                2026
_reflns_number_total             2673
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ac6156.cif
_cod_data_source_block           I
_cod_original_cell_volume        1488.7(10)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2205197
_cod_database_fobs_code          2205197