5-Hydroxy-6,7-dimethoxy-2-[(<i>E</i>)-1-(4-methoxyphenyl)methylidene]-3,4-dihydro-2<i>H</i>-napthalen-1-one
Turner, Alan B.; Harrison, William T. A.; Acta Crystallographica Section E 62 (2006) o386–o387; doi:10.1107/S1600536805041097

data_2207917
_publ_section_title
5-Hydroxy-6,7-dimethoxy-2-[(<i>E</i>)-1-(4-methoxyphenyl)methylidene]-3,4-dihydro-2<i>H</i>-napthalen-1-one
_journal_coeditor_code           WK6071
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o386
_journal_page_last               o387
_journal_paper_doi               10.1107/S1600536805041097
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C20 H20 O5'
_chemical_formula_moiety         'C20 H20 O5'
_chemical_formula_sum            'C20 H20 O5'
_chemical_formula_weight         340.36
_chemical_name_common
;
2-(4-methoxybenzylidene)-5-hydroxy-6,7-dimethoxytetral-1-one
;
_chemical_name_systematic
;
5-Hydroxy-6,7-dimethoxy-2-[(E)-1-(4-methoxyphenyl)methylidene]-3,4-dihydro-
2H-napthalen-1-one
2-(4-methoxybenzylidene)-5-hydroxy-6,7-dimethoxytetral-1-one
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   'difmap (O-H) and geom (C-H)'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 119.1321(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.3264(5)
_cell_length_b                   13.3022(5)
_cell_length_c                   15.7673(6)
_cell_measurement_reflns_used    3939
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     3357.5(2)
_computing_cell_refinement       'SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction
;
SCALEPACK and DENZO (Otwinowski & Minor, 1997), and SORTAV
(Blessing, 1995)
;
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f and \w'
_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  0.0419
_diffrn_reflns_av_sigmaI/netI    0.0339
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            20240
_diffrn_reflns_theta_full        27.54
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         3.06
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.989
_exptl_absorpt_correction_T_min  0.979
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2003)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.347
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1440
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.281
_refine_diff_density_min         -0.227
_refine_ls_extinction_coef       0.0030(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.070
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     233
_refine_ls_number_reflns         3856
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0553
_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^)+(0.0447P)^2^+3.3509P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1083
_refine_ls_wR_factor_ref         0.1139
_reflns_number_gt                3231
_reflns_number_total             3856
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            wk6071.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2207917
_cod_database_fobs_code          2207917