5,7-Dihydroxy-3,6,8-trimethoxyflavone
Xiong, Hui-Ping; Wu, Zhi-Jun; Chen, Fa-Tang; Chen, Wan-Sheng; Acta Crystallographica Section E 65 (2009) o3276–o3277; doi:10.1107/S1600536809050715

data_2224391
_publ_section_title
;
 5,7-Dihydroxy-3,6,8-trimethoxyflavone
;
_journal_coeditor_code           PK2205
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3276
_journal_page_last               o3277
_journal_paper_doi               10.1107/S1600536809050715
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C18 H16 O7'
_chemical_formula_sum            'C18 H16 O7'
_chemical_formula_weight         344.31
_chemical_name_common
;
5,7-Dihydroxy-3,6,8-trimethoxyflavone
;
_chemical_name_systematic
;
5,7-dihydroxy-3,6,8-trimethoxy-4<i>H</i>-chromen-4-one
;
_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                74.233(5)
_cell_angle_beta                 86.461(5)
_cell_angle_gamma                86.845(5)
_cell_formula_units_Z            4
_cell_length_a                   10.147(4)
_cell_length_b                   11.493(4)
_cell_length_c                   14.134(5)
_cell_measurement_pressure       1
_cell_measurement_reflns_used    688
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.144
_cell_measurement_theta_min      2.67
_cell_volume                     1582.0(10)
_computing_cell_refinement       'SAINT (Bruker, 2005)'
_computing_data_collection       'SMART (Bruker, 2005)'
_computing_data_reduction        'SAINT (Bruker, 2005)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area-detector'
_diffrn_measurement_method       '\f and \w 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  0.0423
_diffrn_reflns_av_sigmaI/netI    0.0592
_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       9
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7698
_diffrn_reflns_theta_full        25.20
_diffrn_reflns_theta_max         25.20
_diffrn_reflns_theta_min         1.50
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.112
_exptl_absorpt_correction_T_max  0.978
_exptl_absorpt_correction_T_min  0.967
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.446
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.247
_refine_diff_density_min         -0.350
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.962
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     481
_refine_ls_number_reflns         5590
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.962
_refine_ls_R_factor_all          0.0961
_refine_ls_R_factor_gt           0.0606
_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^)+(0.0916P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1540
_refine_ls_wR_factor_ref         0.1707
_reflns_number_gt                3283
_reflns_number_total             5590
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            pk2205.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-Scan' changed
to 'multi-scan' 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 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-Scan'
changed to 'multi-scan' 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_database_code               2224391
_cod_database_fobs_code          2224391