2,6-Bis(2,4-dichlorobenzylidene)cyclohexanone
Guo, Huan-Mei; Liu, Li; Jian, Fang-Fang; Acta Crystallographica Section E 64 (2008) o1626–; doi:10.1107/S1600536808023003

data_2218870
_publ_section_title
;
 2,6-Bis(2,4-dichlorobenzylidene)cyclohexanone
;
_journal_coeditor_code           AT2592
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1626
_journal_paper_doi               10.1107/S1600536808023003
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H14 Cl4 O'
_chemical_formula_moiety         'C20 H14 Cl4 O'
_chemical_formula_sum            'C20 H14 Cl4 O'
_chemical_formula_weight         412.11
_chemical_name_systematic
;
2,6-Bis(2,4-dichlorobenzylidene)cyclohexanone
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   14.469(2)
_cell_length_b                   8.0602(12)
_cell_length_c                   31.554(4)
_cell_measurement_temperature    293(2)
_cell_volume                     3679.9(9)
_computing_cell_refinement       'SMART (Bruker, 1997)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SAINT (Bruker, 1997)'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Bruker SMART 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  0.0532
_diffrn_reflns_av_sigmaI/netI    0.0475
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            21985
_diffrn_reflns_theta_full        28.41
_diffrn_reflns_theta_max         28.41
_diffrn_reflns_theta_min         1.29
_exptl_absorpt_coefficient_mu    0.649
_exptl_absorpt_correction_T_max  0.9380
_exptl_absorpt_correction_T_min  0.8812
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.488
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bar
_exptl_crystal_F_000             1680
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.279
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         4570
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.0981
_refine_ls_R_factor_gt           0.0495
_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^)+(0.0381P)^2^+1.6278P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1011
_refine_ls_wR_factor_ref         0.1176
_reflns_number_gt                2735
_reflns_number_total             4570
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            at2592.cif
_cod_data_source_block           I
_cod_database_code               2218870
_cod_database_fobs_code          2218870