Very strong (-)N-X(+)(-)O-N(+) halogen bonds.
Puttreddy, Rakesh; Jurček, Ondřej; Bhowmik, Sandip; Mäkelä, Toni; Rissanen, Kari; Chemical communications (Cambridge, England) 52 (2016) 2338–2341; doi:10.1039/c5cc09487a

data_7118327
_publ_section_title
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 Very strong (-)N-X(+)(-)O-N(+) halogen bonds.
;
_journal_issue                   11
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2338
_journal_page_last               2341
_journal_paper_doi               10.1039/c5cc09487a
_journal_volume                  52
_journal_year                    2016
_chemical_formula_moiety         'C18 H13 I N2 O4 S'
_chemical_formula_sum            'C18 H13 I N2 O4 S'
_chemical_formula_weight         480.26
_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'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2015-08-09
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_audit_update_record
;
2015-09-21 deposited with the CCDC.
2015-12-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.71(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.277(3)
_cell_length_b                   10.283(2)
_cell_length_c                   14.972(3)
_cell_measurement_temperature    170
_cell_volume                     1810.3(7)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_diffrn_ambient_temperature      170
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0636
_diffrn_reflns_av_unetI/netI     0.0564
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            16159
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.248
_diffrn_reflns_theta_max         25.248
_diffrn_reflns_theta_min         1.732
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.910
_exptl_absorpt_correction_T_max  0.7453
_exptl_absorpt_correction_T_min  0.5817
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0784 before and 0.0636 after correction.
The Ratio of minimum to maximum transmission is 0.7805.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.762
_exptl_crystal_description       block
_exptl_crystal_F_000             944
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.468
_refine_diff_density_min         -0.321
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.010
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         3276
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.010
_refine_ls_R_factor_all          0.0785
_refine_ls_R_factor_gt           0.0392
_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^)+(0.0151P)^2^+2.1819P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0637
_refine_ls_wR_factor_ref         0.0734
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2144
_reflns_number_total             3276
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5cc09487a2.cif
_cod_data_source_block           3_NISac
_cod_depositor_comments
'Adding full bibliography for 7118322--7118329.cif.'
_cod_database_code               7118327
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C4(H4), C5(H5), C7(H7), C8(H8), C9(H9), C10(H10), C11(H11),
 C15(H15), C16(H16), C17(H17), C18(H18)
;
_shelx_res_checksum              64358
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'