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_7118323
_publ_section_title
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 Very strong (-)N-X(+)(-)O-N(+) halogen bonds.
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_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         'C10 H11 I N2 O3, 0.5(H2 O)'
_chemical_formula_sum            'C10 H12 I N2 O3.5'
_chemical_formula_weight         343.11
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_audit_creation_date             2015-07-28
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_audit_update_record
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2015-09-21 deposited with the CCDC.
2015-12-15 downloaded from the CCDC.
;
_cell_angle_alpha                90.02(3)
_cell_angle_beta                 110.88(3)
_cell_angle_gamma                93.06(3)
_cell_formula_units_Z            4
_cell_length_a                   9.7294(19)
_cell_length_b                   11.427(2)
_cell_length_c                   11.566(2)
_cell_measurement_temperature    170
_cell_volume                     1199.5(4)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      170
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0269
_diffrn_reflns_av_unetI/netI     0.0330
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            12583
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.249
_diffrn_reflns_theta_max         25.249
_diffrn_reflns_theta_min         1.785
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.670
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6064
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0712 before and 0.0540 after correction.
The Ratio of minimum to maximum transmission is 0.8132.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.900
_exptl_crystal_description       block
_exptl_crystal_F_000             668
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.405
_refine_diff_density_min         -0.471
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     303
_refine_ls_number_reflns         4354
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0273
_refine_ls_R_factor_gt           0.0229
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+1.7921P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0479
_refine_ls_wR_factor_ref         0.0494
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3893
_reflns_number_total             4354
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5cc09487a2.cif
_cod_data_source_block           2_NIS
_cod_depositor_comments
'Adding full bibliography for 7118322--7118329.cif.'
_cod_original_cell_volume        1199.4(5)
_cod_database_code               7118323
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H,H) groups
2.a Free rotating group:
 O7(H7A,H7B)
2.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B), C9(H9A,H9B), C18(H18A,H18B), C19(H19A,H19B)
2.c Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C11(H11), C12(H12), C13(H13), C14(H14)
2.d Idealised Me refined as rotating group:
 C6(H6A,H6B,H6C), C16(H16A,H16B,H16C)
;
_shelx_res_checksum              28452
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'