9-(4-Hydroxy-3,5-dimethoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1<i>H</i>-xanthene-1,8(2<i>H</i>)-dione
Sughanya, V.; Sureshbabu, N.; Acta Crystallographica Section E 68 (2012) o1060–; doi:10.1107/S1600536812010410

data_2234266
_publ_section_title
;
 9-(4-Hydroxy-3,5-dimethoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-hexahydro-1<i>H</i>-xanthene-1,8(2<i>H</i>)-dione
;
_journal_coeditor_code           IM2356
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1060
_journal_paper_doi               10.1107/S1600536812010410
_journal_volume                  68
_journal_year                    2012
_chemical_formula_iupac          'C25 H30 O6'
_chemical_formula_moiety         'C25 H30 O6'
_chemical_formula_sum            'C25 H30 O6'
_chemical_formula_weight         426.49
_chemical_name_systematic
;
9-(4-Hydroxy-3,5-dimethoxyphenyl)-3,3,6,6-tetramethyl-3,4,5,6,7,9-
hexahydro-1<i>H</i>-xanthene-1,8(2<i>H</i>)-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                84.973(6)
_cell_angle_beta                 70.377(5)
_cell_angle_gamma                75.676(6)
_cell_formula_units_Z            2
_cell_length_a                   9.4268(9)
_cell_length_b                   10.2468(10)
_cell_length_c                   12.6122(11)
_cell_measurement_reflns_used    5637
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.45
_cell_measurement_theta_min      2.35
_cell_volume                     1111.83(19)
_computing_cell_refinement       'APEX2 and SAINT (Bruker, 2004)'
_computing_data_collection       'APEX2 (Bruker, 2004)'
_computing_data_reduction        'SAINT and XPREP (Bruker, 2004)'
_computing_molecular_graphics
'ORTEP-3 (Farrugia, 1997) and Mercury (Macrae <i>et al.</i>, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR92 (Altomare <i>et al.</i>, 1993)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.950
_diffrn_measured_fraction_theta_max 0.950
_diffrn_measurement_device_type  'Bruker Kappa APEXII CCD'
_diffrn_measurement_method       '\w and \f scan'
_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  0.0519
_diffrn_reflns_av_sigmaI/netI    0.0607
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20849
_diffrn_reflns_theta_full        28.26
_diffrn_reflns_theta_max         28.26
_diffrn_reflns_theta_min         2.36
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_T_max  0.9822
_exptl_absorpt_correction_T_min  0.9235
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.274
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.279
_refine_diff_density_min         -0.205
_refine_ls_extinction_coef       0.008(2)
_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   0.983
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     288
_refine_ls_number_reflns         5233
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.983
_refine_ls_R_factor_all          0.1113
_refine_ls_R_factor_gt           0.0513
_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^)+(0.0666P)^2^+0.3374P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1209
_refine_ls_wR_factor_ref         0.1571
_reflns_number_gt                2876
_reflns_number_total             5233
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            im2356.cif
_cod_data_source_block           I
_cod_original_cell_volume        1111.83(18)
_cod_database_code               2234266
_cod_database_fobs_code          2234266