6-Methylflavone
Hall, Belinda J.; Hanrahan, Jane R.; Johnston, Graham A. R.; Hambley, Trevor W.; Hibbs, David E.; Acta Crystallographica Section E 57 (2001) o592–o593; doi:10.1107/S1600536801008571

data_2200530
_publ_section_title
;
 6-Methylflavone
;
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o592
_journal_page_last               o593
_journal_paper_doi               10.1107/S1600536801008571
_journal_volume                  57
_journal_year                    2001
_chemical_formula_sum            'C16 H12 O2'
_chemical_formula_weight         236.26
_chemical_melting_point          125.5(15)
_chemical_name_common            6-methylflavone
_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'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 90.043(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   4.7103(8)
_cell_length_b                   11.684(2)
_cell_length_c                   21.352(4)
_cell_measurement_reflns_used    999
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.3
_cell_measurement_theta_min      1.9
_cell_volume                     1175.1(4)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        'SAINT (Siemens, 1995)'
_computing_molecular_graphics    'Ortep3 for Windows (Farrugia, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full .946
_diffrn_measured_fraction_theta_max .946
_diffrn_measurement_device_type  'Bruker SMART 1000 CCD'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .033
_diffrn_reflns_av_sigmaI/netI    .050
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            7396
_diffrn_reflns_theta_full        28.3
_diffrn_reflns_theta_max         28.3
_diffrn_reflns_theta_min         1.9
_exptl_absorpt_coefficient_mu    .087
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.335
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             496
_exptl_crystal_size_max          .25
_exptl_crystal_size_mid          .15
_exptl_crystal_size_min          .15
_refine_diff_density_max         .26
_refine_diff_density_min         -.20
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   .934
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         2758
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      .934
_refine_ls_R_factor_all          .085
_refine_ls_R_factor_gt           .045
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0696P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .127
_reflns_number_gt                1644
_reflns_number_total             2758
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            tk6019.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:

'_chemical_melting_point' value '124-127' was changed to '125.5(15)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 

The following automatic conversions were performed:

'_chemical_melting_point' value '124-127' was changed to '125.5(15)'
- the average value was taken and precision was
estimated.

'_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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1175.1(3)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2200530
_cod_database_fobs_code          2200530