2,3-Dimethoxy-5,12-tetracenequinone
Kitamura, Chitoshi; Akamatsu, Naoki; Yoneda, Akio; Kawase, Takeshi; Acta Crystallographica Section E 65 (2009) o324–; doi:10.1107/S1600536809001147

data_2220780
_publ_section_title
;
 2,3-Dimethoxy-5,12-tetracenequinone
;
_journal_coeditor_code           GK2182
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o324
_journal_paper_doi               10.1107/S1600536809001147
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C20 H14 O4'
_chemical_formula_moiety         'C20 H14 O4'
_chemical_formula_sum            'C20 H14 O4'
_chemical_formula_weight         318.31
_chemical_name_systematic
;
2,3-Dimethoxy-5,12-tetracenequinone
;
_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'
_cell_angle_alpha                90
_cell_angle_beta                 97.8830(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.290(3)
_cell_length_b                   6.9781(19)
_cell_length_c                   25.779(8)
_cell_measurement_reflns_used    4021
_cell_measurement_temperature    223
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      3.03
_cell_volume                     1477.2(8)
_computing_cell_refinement       'CrystalClear (Rigaku, 2001)'
_computing_data_collection       'CrystalClear (Rigaku, 2001)'
_computing_data_reduction        'CrystalClear (Rigaku, 2001)'
_computing_molecular_graphics
'ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae <i>et al.</i>, 2006)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla <i>et al.</i>,  2005)'
_diffrn_ambient_temperature      223
_diffrn_detector_area_resol_mean 14.7059
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
;
Rigaku Mercury CCD area-detector
;
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating-anode X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0326
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            11405
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.03
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.1
_exptl_absorpt_correction_T_max  0.997
_exptl_absorpt_correction_T_min  0.988
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   '(NUMABS; Higashi, 1999)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.431
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.284
_refine_diff_density_min         -0.184
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.12
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         3370
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.12
_refine_ls_R_factor_all          0.0621
_refine_ls_R_factor_gt           0.0502
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0725P)^2^+0.2183P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.137
_refine_ls_wR_factor_ref         0.1465
_reflns_number_gt                2773
_reflns_number_total             3370
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            gk2182.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2220780
_cod_database_fobs_code          2220780