6,8-Di-<i>tert</i>-butyl-3-(4-nitrophenyl)-2<i>H</i>-chromen-2-one
Zhou, XiaoFeng; Acta Crystallographica Section E 66 (2010) o478–; doi:10.1107/S1600536810002321

data_2225103
_publ_section_title
;
 6,8-Di-<i>tert</i>-butyl-3-(4-nitrophenyl)-2<i>H</i>-chromen-2-one
;
_journal_coeditor_code           RZ2409
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o478
_journal_paper_doi               10.1107/S1600536810002321
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C23 H25 N O4'
_chemical_formula_moiety         'C23 H25 N O4'
_chemical_formula_sum            'C23 H25 N O4'
_chemical_formula_weight         379.44
_chemical_name_systematic
;
6,8-Di-<i>tert</i>-butyl-3-(4-nitrophenyl)-2<i>H</i>-chromen-2-one
;
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.6463(13)
_cell_length_b                   11.8634(10)
_cell_length_c                   23.604(2)
_cell_measurement_reflns_used    5698
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.28
_cell_measurement_theta_min      3.14
_cell_volume                     4101.3(6)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        'SAINT (Bruker, 2000)'
_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_detector_area_resol_mean 13.6612
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       'phi and omega 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  0.0532
_diffrn_reflns_av_sigmaI/netI    0.0323
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            33748
_diffrn_reflns_theta_full        27.54
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         2.22
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.982
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker,2000)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.229
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1616
_exptl_crystal_size_max          0.2000
_exptl_crystal_size_mid          0.2000
_exptl_crystal_size_min          0.1000
_refine_diff_density_max         0.186
_refine_diff_density_min         -0.182
_refine_ls_extinction_coef       0.0021(4)
_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   1.010
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         4736
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.0903
_refine_ls_R_factor_gt           0.0463
_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^)+(0.0615P)^2^+0.7021P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1139
_refine_ls_wR_factor_ref         0.1395
_reflns_number_gt                2809
_reflns_number_total             4736
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            rz2409.cif
_cod_data_source_block           I
_cod_database_code               2225103
_cod_database_fobs_code          2225103