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_1556786
_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
;
(C7 H F4 I O2) (C12 H9 N O)2
;
_chemical_formula_sum            'C31 H19 F4 I N2 O4'
_chemical_formula_weight         686.38
_chemical_name_systematic
;
SD---A-1--4 4-I---F4-PhCOOH, 4-benzoylpyridine
;
_space_group_IT_number           5
_space_group_name_Hall           'C 2y'
_space_group_name_H-M_alt        'C 1 2 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'C 1 2 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                 107.453(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   25.216(2)
_cell_length_b                   6.0746(5)
_cell_length_c                   19.0419(16)
_cell_measurement_reflns_used    9991
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      32.60
_cell_measurement_theta_min      2.24
_cell_volume                     2782.5(4)
_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 0.957
_diffrn_measured_fraction_theta_max 0.957
_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  0.0291
_diffrn_reflns_av_sigmaI/netI    0.0388
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            20908
_diffrn_reflns_theta_full        32.57
_diffrn_reflns_theta_max         32.57
_diffrn_reflns_theta_min         1.12
_exptl_absorpt_coefficient_mu    1.218
_exptl_absorpt_correction_T_max  0.7754
_exptl_absorpt_correction_T_min  0.6822
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   TWINABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.638
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.998
_refine_diff_density_min         -2.484
_refine_diff_density_rms         0.161
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.198
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         8074
_refine_ls_number_restraints     45
_refine_ls_restrained_S_all      1.199
_refine_ls_R_factor_all          0.0900
_refine_ls_R_factor_gt           0.0832
_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^)+(0.0600P)^2^+40.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2130
_refine_ls_wR_factor_ref         0.2173
_reflns_number_gt                7262
_reflns_number_total             8074
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            lc5065.cif
_cod_data_source_block           IF4CO4
_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
_cod_database_code               1556786
_publcif_datablock.id            {ef47de1f-c7a7-4378-9ca7-85ad217c0dbb}