Anomalous Halogen-Halogen Interaction Assists Radial Chromophoric Assembly.
Niyas, M. A.; Ramakrishnan, Remya; Vijay, Vishnu; Sebastian, Ebin; Hariharan, Mahesh; Journal of the American Chemical Society 141 (2019) 4536–4540; doi:10.1021/jacs.8b13754

data_4128941
_publ_section_title
;
 Anomalous Halogen-Halogen Interaction Assists Radial Chromophoric
 Assembly.
;
_journal_issue                   11
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4536
_journal_page_last               4540
_journal_paper_doi               10.1021/jacs.8b13754
_journal_volume                  141
_journal_year                    2019
_chemical_formula_moiety         'C24 H19 Br2 N O2'
_chemical_formula_sum            'C24 H19 Br2 N O2'
_chemical_formula_weight         513.22
_space_group_crystal_system      trigonal
_space_group_IT_number           167
_space_group_name_Hall           '-R 3 2"c'
_space_group_name_H-M_alt        'R -3 c :H'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2017/1
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            18
_cell_length_a                   17.3148(8)
_cell_length_b                   17.3148(8)
_cell_length_c                   37.394(2)
_cell_measurement_reflns_used    3297
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      17.84
_cell_measurement_theta_min      2.35
_cell_volume                     9708.8(8)
_computing_cell_refinement       'APEX3/SAINT (Bruker, 2016)'
_computing_data_collection       'APEX3 (Bruker, 2016)'
_computing_data_reduction        'SAINT/XPREP (Bruker, 2016)'
_computing_molecular_graphics
'ORTEP3 (Farrugia, 1997) and Mercury (Bruno et al., 2002)'
_computing_publication_material  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 0
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker KAPPA APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1135
_diffrn_reflns_av_unetI/netI     0.0414
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -44
_diffrn_reflns_number            35597
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        24.984
_diffrn_reflns_theta_max         24.984
_diffrn_reflns_theta_min         2.353
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    3.777
_exptl_absorpt_correction_T_max  0.805
_exptl_absorpt_correction_T_min  0.519
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2016)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.580
_exptl_crystal_density_meas      1.581
_exptl_crystal_density_method    NONE
_exptl_crystal_description       plate
_exptl_crystal_F_000             4608
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.060
_refine_diff_density_max         1.192
_refine_diff_density_min         -1.073
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     134
_refine_ls_number_reflns         1906
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.1329
_refine_ls_R_factor_gt           0.0685
_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^)+(0.0957P)^2^+109.0758P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1767
_refine_ls_wR_factor_ref         0.2334
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1001
_reflns_number_total             1906
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b13754_si_002.cif
_cod_data_source_block           NIBr2
_cod_original_cell_volume        9708.9(11)
_cod_database_code               4128941
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.519
_shelx_estimated_absorpt_t_max   0.805
_shelx_res_checksum              98895
_shelx_hkl_checksum              29054