3,5,7-Trimethoxy-2-phenyl-4<i>H</i>-1-benzopyran-4-one
Jeannie Bee-Jan Teh; Hoong-Kun Fun; Ibrahim Abdul Razak; Nawong Boonnak; Suchada Chantrapromma; Chatchanok Karalai; Acta Crystallographica Section E 61 (2005) o3653–o3655; doi:10.1107/S1600536805031971

data_2207188
_publ_section_title
;
 3,5,7-Trimethoxy-2-phenyl-4<i>H</i>-1-benzopyran-4-one
;
_journal_coeditor_code           CI6672
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3653
_journal_page_last               o3655
_journal_paper_doi               10.1107/S1600536805031971
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C18 H16 O5'
_chemical_formula_moiety         'C18 H16 O5'
_chemical_formula_sum            'C18 H16 O5'
_chemical_formula_weight         312.31
_chemical_melting_point          .476E-305
_chemical_name_common
;
3,5,7-trimethoxy-flavone
;
_chemical_name_systematic
;
3,5,7-trimethoxy-2-phenyl-4H-1-benzopyran-4-one
;
_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                90.00
_cell_angle_beta                 109.4660(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.4026(2)
_cell_length_b                   18.4985(4)
_cell_length_c                   11.4109(2)
_cell_measurement_reflns_used    5703
_cell_measurement_temperature    100.00(10)
_cell_measurement_theta_max      30.09
_cell_measurement_theta_min      2.19
_cell_volume                     1473.26(6)
_computing_cell_refinement       APEX2
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  'SHELXTL and PLATON (Spek, 2003)'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1998)'
_diffrn_ambient_temperature      100.0(10)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type
;
Bruker SMART APEX-2 CCD area-detector with  Oxford Cyrosystems Cobra
low-temperature attachment
;
_diffrn_measurement_method       \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  0.0266
_diffrn_reflns_av_sigmaI/netI    0.0202
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            27408
_diffrn_reflns_theta_full        30.09
_diffrn_reflns_theta_max         30.09
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.978
_exptl_absorpt_correction_T_min  0.964
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2005)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.408
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.439
_refine_diff_density_min         -0.203
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     211
_refine_ls_number_reflns         4323
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0493
_refine_ls_R_factor_gt           0.0419
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.054P)^2^+0.5096P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1063
_refine_ls_wR_factor_ref         0.1113
_reflns_number_gt                3718
_reflns_number_total             4323
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci6672.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2207188