Chiral Hexahalogenated 4,4'-Bipyridines.
Mamane, V.; Peluso, P.; Aubert, E.; Cossu, S.; Pale, P.; The Journal of organic chemistry 81 (2016) 4576–4587; doi:10.1021/acs.joc.6b00413

data_4036742
_publ_section_title
;
 Chiral Hexahalogenated 4,4'-Bipyridines.
;
_journal_issue                   11
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4576
_journal_page_last               4587
_journal_paper_doi               10.1021/acs.joc.6b00413
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C10 H2 Br6 N2'
_chemical_formula_sum            'C10 H2 Br6 N2'
_chemical_formula_weight         629.60
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.64440(10)
_cell_length_b                   11.7708(2)
_cell_length_c                   16.6604(3)
_cell_measurement_reflns_used    9199
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      76.3234
_cell_measurement_theta_min      3.7521
_cell_volume                     1499.11(4)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SIR_92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'SuperNova, Dual, Mo at zero, Atlas'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0340
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            11688
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         76.520
_diffrn_reflns_theta_min         4.600
_diffrn_source                   'Enhance (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    19.224
_exptl_absorpt_correction_T_max  0.278
_exptl_absorpt_correction_T_min  0.046
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Analytical numeric absorption correction using a multifaceted crystal
			model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.790
_exptl_crystal_description       block
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.2596
_exptl_crystal_size_mid          0.1546
_exptl_crystal_size_min          0.1213
_refine_diff_density_max         0.875
_refine_diff_density_min         -0.951
_refine_diff_density_rms         0.204
_refine_ls_abs_structure_details
;
 Flack x determined using 1306 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.159
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     163
_refine_ls_number_reflns         3150
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.159
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0287
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0478P)^2^+2.3770P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0754
_refine_ls_wR_factor_ref         0.0754
_reflns_Friedel_coverage         0.729
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.998
_reflns_number_gt                3139
_reflns_number_total             3150
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo6b00413_si_003.cif
_cod_data_source_block           shelx
_cod_database_code               4036742
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              34636
_shelx_hkl_checksum              4797