2-(Dibromomethyl)-4<i>H</i>-chromen-4-one
Huang, Wei; Zhao, Pei-Liang; Xie, Chang; Zhou, Zhong-Zhen; Yang, Guang-Fu; Acta Crystallographica Section E 61 (2005) o3948–o3949; doi:10.1107/S1600536805035166

data_2207354
_publ_section_title
;
 2-(Dibromomethyl)-4<i>H</i>-chromen-4-one
;
_journal_coeditor_code           SU6237
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3948
_journal_page_last               o3949
_journal_paper_doi               10.1107/S1600536805035166
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C10 H6 Br2 O2'
_chemical_formula_moiety         'C10 H6 Br2 O2'
_chemical_formula_sum            'C10 H6 Br2 O2'
_chemical_formula_weight         317.97
_chemical_name_systematic
;
 2-(Dibromomethyl)chromen-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           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.884(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.2343(14)
_cell_length_b                   10.3445(18)
_cell_length_c                   12.047(2)
_cell_measurement_reflns_used    2048
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      25.14
_cell_measurement_theta_min      2.60
_cell_volume                     1018.8(3)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2001)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      292(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker SMART 4K CCD area-detector'
_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  0.0247
_diffrn_reflns_av_sigmaI/netI    0.0311
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            5018
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         2.60
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    7.925
_exptl_absorpt_correction_T_max  0.453
_exptl_absorpt_correction_T_min  0.179
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    2.073
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.562
_refine_diff_density_min         -0.468
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.130
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         1802
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.130
_refine_ls_R_factor_all          0.0437
_refine_ls_R_factor_gt           0.0348
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0485P)^2^+1.7251P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1017
_refine_ls_wR_factor_ref         0.1057
_reflns_number_gt                1496
_reflns_number_total             1802
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su6237.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_cell_volume        1018.7(3)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2207354
_cod_database_fobs_code          2207354