2'-Hydroxy-4,4',5',6'-tetramethoxychalcone
Wafo, Pascal; Hussain, Hidayat; Kouam, Simeon F.; Ngadjui, Bonaventure T.; Flörke, Ulrich; Krohn, Karsten; Acta Crystallographica Section E 61 (2005) o3017–o3019; doi:10.1107/S1600536805026292

data_2206640
_publ_section_title
;
 2'-Hydroxy-4,4',5',6'-tetramethoxychalcone
;
_journal_coeditor_code           BT6717
_journal_issue                   9
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3017
_journal_page_last               o3019
_journal_paper_doi               10.1107/S1600536805026292
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C19 H20 O6'
_chemical_formula_moiety         'C19 H20 O6'
_chemical_formula_sum            'C19 H20 O6'
_chemical_formula_weight         344.35
_chemical_name_systematic
;
2'-Hydroxy-4,4',5',6'-tetramethoxychalcone
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.649(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.092(4)
_cell_length_b                   15.041(5)
_cell_length_c                   8.256(3)
_cell_measurement_reflns_used    1038
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      22.37
_cell_measurement_theta_min      2.71
_cell_volume                     1607.3(9)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Bruker, 2002)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0684
_diffrn_reflns_av_sigmaI/netI    0.1159
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            7488
_diffrn_reflns_theta_full        28.08
_diffrn_reflns_theta_max         28.08
_diffrn_reflns_theta_min         2.08
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  400
_diffrn_standards_number         1039
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.9782
_exptl_absorpt_correction_T_min  0.9509
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2002)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.423
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.229
_refine_diff_density_min         -0.288
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.908
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         1954
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.907
_refine_ls_R_factor_all          0.0859
_refine_ls_R_factor_gt           0.0504
_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^)+(0.0277P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0814
_refine_ls_wR_factor_ref         0.0884
_reflns_number_gt                1346
_reflns_number_total             1954
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt6717.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      'C c'
_cod_database_code               2206640
_cod_database_fobs_code          2206640