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_1556802
_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) (C4 H4 N2 O)
;
_chemical_formula_sum            'C11 H5 F4 I N2 O3'
_chemical_formula_weight         416.07
_chemical_name_systematic
;
SD-1--8-1--10 4-I---F4-PhCOOH, pyrazine 1-oxide
;
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                110.206(2)
_cell_angle_beta                 95.9700(10)
_cell_angle_gamma                98.5310(10)
_cell_formula_units_Z            2
_cell_length_a                   4.2485(3)
_cell_length_b                   11.6204(8)
_cell_length_c                   13.8288(10)
_cell_measurement_reflns_used    9870
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      33.31
_cell_measurement_theta_min      4.90
_cell_volume                     624.68(8)
_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 0.994
_diffrn_measured_fraction_theta_max 0.915
_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  0.0201
_diffrn_reflns_av_sigmaI/netI    0.0173
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            18348
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         33.14
_diffrn_reflns_theta_min         1.98
_exptl_absorpt_coefficient_mu    2.626
_exptl_absorpt_correction_T_max  0.6217
_exptl_absorpt_correction_T_min  0.4870
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.212
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             396
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.623
_refine_diff_density_min         -0.654
_refine_diff_density_rms         0.119
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     233
_refine_ls_number_reflns         4376
_refine_ls_number_restraints     35
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0186
_refine_ls_R_factor_gt           0.0181
_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^)+(0.0250P)^2^+0.4000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0469
_refine_ls_wR_factor_ref         0.0472
_reflns_number_gt                4274
_reflns_number_total             4376
_reflns_threshold_expression     >2sigma(I)
_publcif_datablock.id            {a1c2e6ac-e33c-45e3-9223-8e45e53e84d9}
_cod_data_source_file            lc5065.cif
_cod_data_source_block           IF4CO16
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Triclinic' was changed to
'triclinic' 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      P-1
_cod_database_code               1556802