A systematic structural study of halogen bonding versus hydrogen bonding within competitive supramolecular systems.
Aakeröy, Christer B; Spartz, Christine L.; Dembowski, Sean; Dwyre, Savannah; Desper, John; IUCrJ 2 (2015) 498–510; doi:10.1107/S2052252515010854

data_1556799
_publ_section_title
;
 A systematic structural study of halogen bonding versus hydrogen bonding
 within competitive supramolecular systems.
;
_journal_issue                   'Pt 5'
_journal_name_full               IUCrJ
_journal_page_first              498
_journal_page_last               510
_journal_paper_doi               10.1107/S2052252515010854
_journal_volume                  2
_journal_year                    2015
_chemical_formula_moiety
;
(C6 H Br F4 O)2 (C12 H12 N2)
;
_chemical_formula_sum            'C24 H14 Br2 F8 N2 O2'
_chemical_formula_weight         674.19
_chemical_name_systematic
;
SD-1--20-12--5, 4-Br---F4-PhOH, 1,2-bis(4-pyridyl)ethane
;
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_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                 103.464(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   25.9125(16)
_cell_length_b                   4.6925(3)
_cell_length_c                   20.0909(12)
_cell_measurement_reflns_used    4226
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      32.42
_cell_measurement_theta_min      2.32
_cell_volume                     2375.8(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.941
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0370
_diffrn_reflns_av_sigmaI/netI    0.0443
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -37
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            11464
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         32.57
_diffrn_reflns_theta_min         2.08
_exptl_absorpt_coefficient_mu    3.502
_exptl_absorpt_correction_T_max  0.5410
_exptl_absorpt_correction_T_min  0.4197
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.885
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1320
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.946
_refine_diff_density_min         -0.966
_refine_diff_density_rms         0.106
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     175
_refine_ls_number_reflns         4064
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0591
_refine_ls_R_factor_gt           0.0385
_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^)+(0.0600P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0989
_refine_ls_wR_factor_ref         0.1085
_reflns_number_gt                3044
_reflns_number_total             4064
_reflns_threshold_expression     >2sigma(I)
_publcif_datablock.id            {4b955d6b-e817-46e8-8329-eb0fed9fa672}
_cod_data_source_file            lc5065.cif
_cod_data_source_block           BrF4OH11
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/IUCr/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1556799