The intramolecular hydrogen bonded-halogen bond: a new strategy for preorganization and enhanced binding.
Riel, Asia Marie S.; Decato, Daniel A.; Sun, Jiyu; Massena, Casey J.; Jessop, Morly J.; Berryman, Orion B.; Chemical science 9 (2018) 5828–5836; doi:10.1039/c8sc01973h

data_1549583
_publ_section_title
;
 The intramolecular hydrogen bonded-halogen bond: a new strategy for
 preorganization and enhanced binding.
;
_journal_issue                   26
_journal_name_full               'Chemical science'
_journal_page_first              5828
_journal_page_last               5836
_journal_paper_doi               10.1039/c8sc01973h
_journal_volume                  9
_journal_year                    2018
_chemical_formula_moiety         'C22 H16 I2 N2, 2(Cl)'
_chemical_formula_sum            'C22 H16 Cl2 I2 N2'
_chemical_formula_weight         633.07
_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
_atom_sites_solution_primary     dual
_audit_creation_date             2017-05-01
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5335)
;
_audit_update_record
;
2018-02-22 deposited with the CCDC.
2018-06-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.8200(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.1408(3)
_cell_length_b                   18.1854(6)
_cell_length_c                   13.7305(5)
_cell_measurement_reflns_used    9427
_cell_measurement_temperature    100
_cell_measurement_theta_max      27.532
_cell_measurement_theta_min      3.021
_cell_volume                     2241.83(13)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection       'APEX2 (Bruker-AXS, 2007)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_detector                 'Bruker Photon-100 area detector'
_diffrn_detector_area_resol_mean 10.5
_diffrn_detector_type            'CMOS area detector'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       'Fixed Chi Three-Circle Diffractometer'
_diffrn_measurement_device_type  'Bruker D8 VENTURE Duo'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'TRIUMPH graphite'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_radiation_xray_symbol    K-L~3~
_diffrn_reflns_av_R_equivalents  0.0383
_diffrn_reflns_av_unetI/netI     0.0242
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.986
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            37851
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.986
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.604
_diffrn_reflns_theta_min         3.021
_diffrn_source                   'sealed tube'
_diffrn_source_type              fine-focus
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.054
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6151
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/4 (Bruker,2014/4) was used for absorption correction. wR2(int) was 0.0594 before and 0.0327 after correction. The Ratio of minimum to maximum transmission is 0.8250. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.876
_exptl_crystal_description       plate
_exptl_crystal_F_000             1208
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.03
_refine_diff_density_max         2.281
_refine_diff_density_min         -0.628
_refine_diff_density_rms         0.125
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.064
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         5125
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.063
_refine_ls_R_factor_all          0.0398
_refine_ls_R_factor_gt           0.0272
_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^)+(0.0261P)^2^+5.1722P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0591
_refine_ls_wR_factor_ref         0.0634
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4270
_reflns_number_total             5125
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8sc01973h2.cif
_cod_data_source_block           iotfcl
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 

 Adding full bibliography for 1549577--1549583.cif.
;
_cod_database_code               1549583
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained planarity
 C4, C3, C2, C1, N1, C5
 with sigma of 0.1
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C4(H4), C5(H5), C9(H9), C10(H10), C11(H11), C12(H12), C17(H17),
 C18(H18), C20(H20)
3.b Idealised Me refined as rotating group:
 C21(H21A,H21B,H21C), C22(H22A,H22B,H22C)
;
_shelx_res_checksum              43703
_olex2_submission_special_instructions 'No special instructions were received'