Structure–melting relations in isomeric dibromobenzenes
Dziubek, Kamil F.; Katrusiak, Andrzej; Acta Crystallographica Section B 70 (2014) 492–497; doi:10.1107/S2052520614011445

data_2105859
_publ_section_title
;
 Structure--melting relations in isomeric dibromobenzenes
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              492
_journal_page_last               497
_journal_paper_doi               10.1107/S2052520614011445
_journal_volume                  70
_journal_year                    2014
_chemical_formula_moiety         'C6 H4 Br2'
_chemical_formula_sum            'C6 H4 Br2'
_chemical_formula_weight         235.89
_chemical_melting_point          266
_chemical_name_common            m-dibromobenzene
_chemical_name_systematic
;
1,3-dibromobenzene
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   4.1264(4)
_cell_length_b                   12.9505(13)
_cell_length_c                   26.257(2)
_cell_measurement_temperature    260(2)
_cell_volume                     1403.1(2)
_computing_cell_refinement       'CrysAlisPro (Agilent Technologies, 2014)'
_computing_data_collection       'CrysAlisPro (Agilent Technologies, 2014)'
_computing_data_reduction
'CrysAlisPro (Agilent Technologies, 2014); REDSHADE (Katrusiak, A. 2003)'
_computing_molecular_graphics    'DIAMOND (Crystal Impact, 1999)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      260(2)
_diffrn_measured_fraction_theta_full 0.941
_diffrn_measured_fraction_theta_max 0.941
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       \w-scans
_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  0.0588
_diffrn_reflns_av_sigmaI/netI    0.0660
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            13571
_diffrn_reflns_theta_full        29.75
_diffrn_reflns_theta_max         29.75
_diffrn_reflns_theta_min         2.21
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    11.444
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.03806
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro (Agilent Technologies, 2014).
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.234
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             880
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.433
_refine_diff_density_min         -0.360
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.992
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     85
_refine_ls_number_reflns         3621
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.992
_refine_ls_R_factor_all          0.1148
_refine_ls_R_factor_gt           0.0514
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0380P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0940
_refine_ls_wR_factor_ref         0.1141
_reflns_number_gt                1976
_reflns_number_total             3621
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            zb5043sup1.cif
_cod_data_source_block           m-dibromobenzene_260K
_cod_database_code               2105859