1,4-Bis(bromomethyl)benzene
Zhang, Min; Su, Ping; Xu, Xing-Man; Acta Crystallographica Section E 63 (2007) o951–o952; doi:10.1107/S1600536807002954

data_2212018
_publ_section_title
;
 1,4-Bis(bromomethyl)benzene
;
_journal_coeditor_code           BH2075
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o951
_journal_page_last               o952
_journal_paper_doi               10.1107/S1600536807002954
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C8 H8 Br2'
_chemical_formula_moiety         'C8 H8 Br2'
_chemical_formula_sum            'C8 H8 Br2'
_chemical_formula_weight         263.96
_chemical_name_systematic
;
1,4-Bis(bromomethyl)benzene
;
_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                 98.8850(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.7424(7)
_cell_length_b                   4.6275(4)
_cell_length_c                   10.8189(9)
_cell_measurement_reflns_used    1976
_cell_measurement_temperature    297(2)
_cell_measurement_theta_max      28.02
_cell_measurement_theta_min      2.36
_cell_volume                     432.43(6)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT-Plus (Bruker, 2001)'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  PLATON
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area-detector'
_diffrn_measurement_method       '0.3\% wide \w exposures'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine focus sealed Siemens Mo tube'
_diffrn_radiation_type           'Mo k\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0428
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3213
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         3.81
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    9.295
_exptl_absorpt_correction_T_max  0.1569
_exptl_absorpt_correction_T_min  0.082
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.027
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             252
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.771
_refine_diff_density_min         -0.850
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     46
_refine_ls_number_reflns         848
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0524
_refine_ls_R_factor_gt           0.0475
_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^)+(0.1099P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1458
_refine_ls_wR_factor_ref         0.1486
_reflns_number_gt                712
_reflns_number_total             848
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bh2075.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2212018
_cod_database_fobs_code          2212018