An alternative method to access diverse N,N′-diquaternised-3,3′-biquinoxalinium “biquinoxen” dications
Leblanc, Nicolas; Sproules, Stephen; Powell, Annie K.; New J. Chem. 41 (2017) 2949–; doi:10.1039/C7NJ00531H

data_7056139
_publ_section_title
;
 An alternative method to access diverse
 N,N&#x2032;-diquaternised-3,3&#x2032;-biquinoxalinium
 &#x201C;biquinoxen&#x201D; dications
;
_journal_issue                   8
_journal_name_full               'New J. Chem.'
_journal_page_first              2949
_journal_paper_doi               10.1039/C7NJ00531H
_journal_volume                  41
_journal_year                    2017
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C20 H20 N4, 2(B F4)'
_chemical_formula_sum            'C20 H20 B2 F8 N4'
_chemical_formula_weight         490.02
_chemical_name_common            Ethylbiquinoxen
_chemical_name_systematic
'N,N'-diethyl-3,3'-biquinoxalinium bis(tetrafluoroborate)'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4.3
_audit_creation_date             2015-07-14T16:06:18-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2016-10-26 deposited with the CCDC.
2017-03-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 101.28(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.371(4)
_cell_length_b                   14.361(7)
_cell_length_c                   15.685(6)
_cell_measurement_reflns_used    7452
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      25.63
_cell_measurement_theta_min      1.32
_cell_measurement_wavelength     0.71073
_cell_volume                     2070.1(16)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'SHELXS-86 (Sheldrick, 1986)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      180
_diffrn_detector                 'image plate ( 34 cm diameter )'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.981
_diffrn_measurement_details      ' 239 frames, detector distance = 130 mm'
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm, multiple pinhole'
_diffrn_radiation_monochromator  'planar graphite'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0373
_diffrn_reflns_Laue_measured_fraction_full 0.987
_diffrn_reflns_Laue_measured_fraction_max 0.981
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7293
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.981
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.624
_diffrn_reflns_theta_min         2.631
_diffrn_source                   'sealed X-ray tube, 12 x 0.4 mm fine focus'
_diffrn_source_current           40
_diffrn_source_power             2.000
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.144
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.319
_exptl_crystal_size_mid          0.193
_exptl_crystal_size_min          0.127
_refine_diff_density_max         0.416
_refine_diff_density_min         -0.311
_refine_diff_density_rms         0.04
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     155
_refine_ls_number_reflns         1932
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0486
_refine_ls_R_factor_gt           0.0389
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0481P)^2^+1.8430P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0981
_refine_ls_wR_factor_ref         0.1082
_reflns_number_gt                1621
_reflns_number_total             1932
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7nj00531h2.cif
_cod_data_source_block           shelx
_cod_original_cell_volume        2069.9(15)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7056139