Crystal structre of 1,4-bis(bromomethyl)-2,3,5,6-tetramethylbenzene, C12H16Br2
Song, Wenqi; Zhao, Mingxu; Zhu, Yanfang; Gao, Jianjing; Zhao, Yuzhen; Zeitschrift für Kristallographie - New Crystal Structures 237 (2022) 819–820; doi:10.1515/ncrs-2022-0233

data_8107225
_publ_section_title
;
 Crystal structre of 1,4-bis(bromomethyl)-2,3,5,6-tetramethylbenzene,
 C12H16Br2
;
_journal_issue                   5
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              819
_journal_page_last               820
_journal_paper_doi               10.1515/ncrs-2022-0233
_journal_volume                  237
_journal_year                    2022
_chemical_formula_moiety         'C12 H16 Br2'
_chemical_formula_sum            'C12 H16 Br2'
_chemical_formula_weight         320.05
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_cell_angle_alpha                90
_cell_angle_beta                 94.534(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.9423(5)
_cell_length_b                   4.4163(3)
_cell_length_c                   16.8127(10)
_cell_measurement_reflns_used    2623
_cell_measurement_temperature    173.00
_cell_measurement_theta_max      59.70
_cell_measurement_theta_min      4.59
_cell_volume                     587.87(6)
_computing_cell_refinement       'SAINT V8.40B (Bruker, 2019)'
_computing_data_collection       'APEX3 V2019.11-0 (Bruker, 2019)'
_computing_data_reduction        'SAINT V8.40B (Bruker, 2019)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2019/2 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      173.00
_diffrn_detector                 CPAD
_diffrn_detector_area_resol_mean 7.41
_diffrn_detector_type            'Bruker PHOTON II'
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 VENTURE Metaljet PHOTON II'
_diffrn_measurement_method       '\w and \f shutterless scans'
_diffrn_measurement_specimen_support 'nylon loop'
_diffrn_radiation_monochromator  'Helios Multi-layer Optic'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0393
_diffrn_reflns_av_unetI/netI     0.0413
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.956
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            4095
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.956
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         60.263
_diffrn_reflns_theta_min         4.591
_diffrn_source                   MetalJet
_diffrn_source_current           2.85
_diffrn_source_power             0.1986165
_diffrn_source_type              'Liquid Metal source'
_diffrn_source_voltage           69.69
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.571
_exptl_absorpt_correction_T_max  0.573
_exptl_absorpt_correction_T_min  0.538
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1053 before and 0.0618 after correction.
The Ratio of minimum to maximum transmission is 0.7008.
The \l/2 correction factor is Not present.
;
_exptl_crystal_density_diffrn    1.808
_exptl_crystal_description       block
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.751
_refine_diff_density_min         -0.660
_refine_diff_density_rms         0.114
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     66
_refine_ls_number_reflns         1275
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.062
_refine_ls_R_factor_all          0.0484
_refine_ls_R_factor_gt           0.0376
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0516P)^2^+0.7288P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0957
_refine_ls_wR_factor_ref         0.1016
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1066
_reflns_number_total             1333
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            suppl_j_ncrs-2022-0233_suppl.cif
_cod_data_source_block           a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_diffrn_radiation_probe' value 'X-ray' was changed to
'x-ray' in accordance with the built-in table derived from the CIF
Core dictionary named 'cif_core.dic' version 2.4.5 last updated on
2014-11-21.

Automatic conversion script
Id: cif_fix_values 8738 2021-04-28 16:35:53Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               8107225
_shelx_estimated_absorpt_t_max   0.606
_shelx_estimated_absorpt_t_min   0.555
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C1(H1A,H1B)
2.b Idealised Me refined as rotating group:
 C5(H5A,H5B,H5C), C6(H6A,H6B,H6C)
;