2,5-Dibromo-6-isopropyl-3-methyl-<i>p</i>-benzoquinone
Lothar Esser; Zbyszek Otwinowski; Hoeon Kim; Acta Crystallographica Section E 58 (2002) o170–o171; doi:10.1107/S1600536801021353

data_2200951
_publ_section_title
;
 2,5-Dibromo-6-isopropyl-3-methyl-<i>p</i>-benzoquinone
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o170
_journal_page_last               o171
_journal_paper_doi               10.1107/S1600536801021353
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C10 H10 Br2 O2'
_chemical_formula_moiety         'C10 H10 Br2 O2'
_chemical_formula_sum            'C10 H10 Br2 O2'
_chemical_formula_weight         322.00
_chemical_melting_point          343(2)
_chemical_name_common            Dibromothymoquinone
_chemical_name_systematic
;
2,5-Dibromo-3-methyl-6-isopropyl-1,4-benzoquinone
;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 100.941(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.4507(2)
_cell_length_b                   18.5945(9)
_cell_length_c                   11.4256(6)
_cell_measurement_reflns_used    15747
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.1
_cell_measurement_theta_min      .918
_cell_volume                     1136.97(9)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction
'DENZO and SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics
'PLATON (Spek, 2001) and ORTEP-32 (Farrugia, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full .923
_diffrn_measured_fraction_theta_max .923
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       \f
_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  .0000
_diffrn_reflns_av_sigmaI/netI    .0074
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            2145
_diffrn_reflns_theta_full        26.36
_diffrn_reflns_theta_max         26.36
_diffrn_reflns_theta_min         3.63
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    7.102
_exptl_absorpt_correction_T_max  .426
_exptl_absorpt_correction_T_min  .180
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   '(SCALEPACK; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.881
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             624
_exptl_crystal_size_max          .54
_exptl_crystal_size_mid          .21
_exptl_crystal_size_min          .12
_refine_diff_density_max         .533
_refine_diff_density_min         -.336
_refine_ls_abs_structure_details '(Flack, 1983), 976 Friedel pairs'
_refine_ls_abs_structure_Flack   .026(12)
_refine_ls_extinction_coef       .0105(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     131
_refine_ls_number_reflns         2145
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          .0261
_refine_ls_R_factor_gt           .0244
_refine_ls_shift/su_max          .004
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0396P)^2^+1.0226P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          .0633
_refine_ls_wR_factor_ref         .0643
_reflns_number_gt                2042
_reflns_number_total             2145
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob6105.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.

'_geom_bond_publ_flag' value 'No' changed to 'no' according
to '/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29 (10 times).

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.

'_geom_bond_publ_flag' value 'No' changed to 'no'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (10
times).

'_geom_angle_publ_flag' value 'No' changed to 'no' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29 (42
times).

'_geom_torsion_publ_flag' value 'No' changed to 'no'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29 (27
times).

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_sg_symbol_H-M      'C c'
_cod_database_code               2200951
_cod_database_fobs_code          2200951