(6b<i>S</i>*,14<i>R</i>*,14a<i>R</i>*)-Methyl 14-(4-methylphenyl)-7-oxo-6b,6c,7,12b,14,14a-hexahydro-1<i>H</i>-pyrano[3,2-<i>c</i>:5,4-<i>c</i>']dichromene-14a-carboxylate
Ponnusamy, R.; Sabari, V.; Sivakumar, G.; Bakthadoss, M.; Aravindhan, S.; Acta Crystallographica Section E 69 (2013) o267–o268; doi:10.1107/S1600536813001244

data_2237401
_publ_section_title
;
 (6b<i>S</i>*,14<i>R</i>*,14a<i>R</i>*)-Methyl
 14-(4-methylphenyl)-7-oxo-6b,6c,7,12b,14,14a-hexahydro-1<i>H</i>-pyrano[3,2-<i>c</i>:5,4-<i>c</i>']dichromene-14a-carboxylate
;
_journal_coeditor_code           SU2541
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o267
_journal_page_last               o268
_journal_paper_doi               10.1107/S1600536813001244
_journal_volume                  69
_journal_year                    2013
_chemical_formula_iupac          'C28 H22 O6'
_chemical_formula_moiety         'C28 H22 O6'
_chemical_formula_sum            'C28 H22 O6'
_chemical_formula_weight         454.46
_chemical_name_systematic
;
(6b<i>S</i>*,14<i>R</i>*,14a<i>R</i>*)-Methyl
14-(4-methylphenyl)-7-oxo-6b,6c,7,12b,14,14a-hexahydro-1<i>H</i>-
pyrano[3,2-<i>c</i>:5,4-<i>c</i>']dichromene-14a-carboxylate
;
_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'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.0
_cell_angle_beta                 97.397(5)
_cell_angle_gamma                90.0
_cell_formula_units_Z            4
_cell_length_a                   9.526(5)
_cell_length_b                   10.711(5)
_cell_length_c                   21.975(5)
_cell_measurement_reflns_used    5710
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.45
_cell_measurement_theta_min      1.83
_cell_volume                     2223.5(16)
_computing_cell_refinement       'SAINT (Bruker, 2008)'
_computing_data_collection       'APEX2 (Bruker, 2008)'
_computing_data_reduction        'SAINT (Bruker, 2008)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 2012)'
_computing_publication_material
'<i>SHELXL97</i> (Sheldrick, 2008) and <i>PLATON</i> (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEXII CCD area-detector'
_diffrn_measurement_method       '\w and \f 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  0.0280
_diffrn_reflns_av_sigmaI/netI    0.0249
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            22624
_diffrn_reflns_theta_full        26.80
_diffrn_reflns_theta_max         26.80
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9917
_exptl_absorpt_correction_T_min  0.9715
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.358
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       monoclinic
_exptl_crystal_F_000             952
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.285
_refine_diff_density_min         -0.162
_refine_ls_extinction_coef       0.0070(10)
_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   1.011
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     324
_refine_ls_number_reflns         4741
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.011
_refine_ls_R_factor_all          0.0702
_refine_ls_R_factor_gt           0.0447
_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^)+(0.0626P)^2^+0.4826P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1159
_refine_ls_wR_factor_ref         0.1327
_reflns_number_gt                3251
_reflns_number_total             4741
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            su2541.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2237401
_cod_database_fobs_code          2237401