Structural Equivalence of Br and I Halogen Bonds: A Route to Isostructural Materials with Controllable Properties
Cinčić, Dominik; Friščić, Tomislav; Jones, William; Chemistry of Materials 20 (2008) 6623–; doi:10.1021/cm800923r

data_4001232
_publ_section_title
;
 Structural Equivalence of Br and I Halogen Bonds: A Route to
 Isostructural Materials with Controllable Properties
;
_journal_issue                   21
_journal_name_full               'Chemistry of Materials'
_journal_page_first              6623
_journal_paper_doi               10.1021/cm800923r
_journal_volume                  20
_journal_year                    2008
_chemical_formula_moiety         '2(C13 H9 N) (C6 Br2 F4)'
_chemical_formula_sum            'C32 H18 Br2 F4 N2'
_chemical_formula_weight         666.30
_chemical_name_systematic
;
 1,4-dibromo-tetrafluorobenzene-acridine 1/2
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.1180(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.9607(2)
_cell_length_b                   5.67340(10)
_cell_length_c                   23.0529(3)
_cell_measurement_reflns_used    36559
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      31.51
_cell_measurement_theta_min      1.02
_cell_volume                     1302.50(4)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius B.V. 1998)'
_computing_data_reduction
;
 HKL Denzo and Scalepack (Otwinowski & Minor 1997)
;
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0517
_diffrn_reflns_av_sigmaI/netI    0.0425
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            12229
_diffrn_reflns_theta_full        31.49
_diffrn_reflns_theta_max         31.49
_diffrn_reflns_theta_min         1.77
_exptl_absorpt_coefficient_mu    3.167
_exptl_absorpt_correction_T_max  0.813
_exptl_absorpt_correction_T_min  0.556
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;

multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)

;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.699
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             660
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.500
_refine_diff_density_min         -1.524
_refine_diff_density_rms         0.226
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.206
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         4313
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.206
_refine_ls_R_factor_all          0.0688
_refine_ls_R_factor_gt           0.0433
_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^)+(0.0827P)^2^+0.4087P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1261
_refine_ls_wR_factor_ref         0.1610
_reflns_number_gt                3250
_reflns_number_total             4313
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cm800923r_si_002.cif
_cod_data_source_block           tfbb-acr_1/2
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4001232