3,3,6,6-Tetramethyl-9-(2-nitrophenyl)-3,4,6,7-tetrahydro-2<i>H</i>-xanthene-1,8(5<i>H</i>,9<i>H</i>)-dione
Mo, Yingming; Zang, Hong-Jun; Cheng, Bo-Wen; Acta Crystallographica Section E 66 (2010) o2129–; doi:10.1107/S1600536810029211

data_2226972
_publ_section_title
;
 3,3,6,6-Tetramethyl-9-(2-nitrophenyl)-3,4,6,7-tetrahydro-2<i>H</i>-xanthene-1,8(5<i>H</i>,9<i>H</i>)-dione
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2129
_journal_paper_doi               10.1107/S1600536810029211
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C23 H25 N O5'
_chemical_formula_moiety         'C23 H25 N O5'
_chemical_formula_sum            'C23 H25 N O5'
_chemical_formula_weight         395.44
_chemical_name_systematic
;
3,3,6,6-Tetramethyl-9-(2-nitrophenyl)-3,4,6,7-tetrahydro-2<i>H</i>-xanthene-1,
8(5<i>H</i>,9<i>H</i>)-dione
;
_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                   12.199(2)
_cell_length_b                   10.510(2)
_cell_length_c                   32.484(7)
_cell_measurement_reflns_used    9106
_cell_measurement_temperature    113(2)
_cell_measurement_theta_max      28.0631
_cell_measurement_theta_min      1.8808
_cell_volume                     4164.8(14)
_computing_cell_refinement       'CrystalClear (Rigaku, 2002)'
_computing_data_collection       'CrystalClear (Rigaku, 2002)'
_computing_data_reduction        'CrystalClear (Rigaku, 2002)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXS97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      113(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Rigaku Saturn CCD area-detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  confocal
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0534
_diffrn_reflns_av_sigmaI/netI    0.0471
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       36
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            21559
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         2.51
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  0.9912
_exptl_absorpt_correction_T_min  0.9825
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear; Rigaku, 2002)'
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.261
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1680
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.223
_refine_diff_density_min         -0.239
_refine_ls_extinction_coef       0.0098(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.158
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     267
_refine_ls_number_reflns         3670
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.158
_refine_ls_R_factor_all          0.0737
_refine_ls_R_factor_gt           0.0632
_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^)+(0.0574P)^2^+1.5964P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1385
_refine_ls_wR_factor_ref         0.1444
_reflns_number_gt                3242
_reflns_number_total             3670
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jh2186.cif
_cod_data_source_block           I
_cod_original_cell_volume        4164.9(14)
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               2226972
_cod_database_fobs_code          2226972