(11<i>SR</i>,15<i>SR</i>)-9,10,11,15-Tetrahydro-9-[(1<i>SR</i>)-1-methoxyethyl]-9,10-[3',4']furanoanthracene-12,14-dione
Clegg, William; Harrington, Ross W.; Acta Crystallographica Section E 58 (2002) o1411–o1412; doi:10.1107/S1600536802021311

data_2201599
_publ_section_title
(11<i>SR</i>,15<i>SR</i>)-9,10,11,15-Tetrahydro-9-[(1<i>SR</i>)-1-methoxyethyl]-9,10-[3',4']furanoanthracene-12,14-dione
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1411
_journal_page_last               o1412
_journal_paper_doi               10.1107/S1600536802021311
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C21 H18 O4'
_chemical_formula_moiety         'C21 H18 O4'
_chemical_formula_sum            'C21 H18 O4'
_chemical_formula_weight         334.35
_chemical_name_systematic
;
(11SR,15SR)-9,10,11,15-Tetrahydro-9-[(1SR)-1-methoxyethyl]-
9,10-[3',4']furanoanthracene-12,14-dione
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                112.886(2)
_cell_angle_beta                 94.278(2)
_cell_angle_gamma                117.285(2)
_cell_formula_units_Z            2
_cell_length_a                   9.5923(8)
_cell_length_b                   10.1129(8)
_cell_length_c                   10.9661(9)
_cell_measurement_reflns_used    4879
_cell_measurement_temperature    160(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      2.4
_cell_volume                     828.42(12)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and local programs'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 2001)'
_diffrn_ambient_temperature      160(2)
_diffrn_detector_area_resol_mean 8.192
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker SMART 1K CCD'
_diffrn_measurement_method       '\w rotation with narrow frames'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0225
_diffrn_reflns_av_sigmaI/netI    0.0355
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5885
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.12
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.279
_refine_diff_density_min         -0.200
_refine_ls_extinction_coef       0.013(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXTL
_refine_ls_goodness_of_fit_ref   1.129
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         2885
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.129
_refine_ls_R_factor_all          0.0650
_refine_ls_R_factor_gt           0.0511
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0388P)^2^+0.5015P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1068
_refine_ls_wR_factor_ref         0.1120
_reflns_number_gt                2332
_reflns_number_total             2885
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob6195.cif
_cod_data_source_block           I
_cod_original_cell_volume        828.41(12)
_cod_database_code               2201599
_cod_database_fobs_code          2201599