2,6-Bis(benzimidazol-2-yl)pyridines as more electron-rich and sterically accessible alternatives to 2,6-bis(imino)pyridine for group 13 coordination chemistry.
Swidan, Ala'aeddeen; Binder, Justin F.; Onge, Blake J St; Suter, Riccardo; Burford, Neil; Macdonald, Charles L. B.; Dalton transactions (Cambridge, England : 2003) 48 (2019) 1284–1291; doi:10.1039/c8dt04276d

data_7048407
_publ_section_title
;
 2,6-Bis(benzimidazol-2-yl)pyridines as more electron-rich and sterically
 accessible alternatives to 2,6-bis(imino)pyridine for group 13
 coordination chemistry.
;
_journal_issue                   4
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1284
_journal_page_last               1291
_journal_paper_doi               10.1039/c8dt04276d
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C25 H21 Cl2 Ga N5, Cl4 Ga'
_chemical_formula_sum            'C25 H20 Cl6 Ga2 N5'
_chemical_formula_weight         742.60
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2018-06-28
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-09-27 deposited with the CCDC.
2018-12-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 102.788(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.6466(7)
_cell_length_b                   18.8631(12)
_cell_length_c                   16.5594(11)
_cell_measurement_reflns_used    9642
_cell_measurement_temperature    170
_cell_measurement_theta_max      30.511
_cell_measurement_theta_min      3.058
_cell_volume                     2938.5(3)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_collection       APEX3
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      169.81
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX3 Photon 100'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0695
_diffrn_reflns_av_unetI/netI     0.0268
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            115507
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.029
_diffrn_reflns_theta_min         2.942
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.405
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5863
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1182 before and 0.0938 after correction. The Ratio of minimum to maximum transmission is 0.7858. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.679
_exptl_crystal_description       block
_exptl_crystal_F_000             1476
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.075
_refine_diff_density_max         0.647
_refine_diff_density_min         -0.780
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.039
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     359
_refine_ls_number_reflns         8584
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0357
_refine_ls_R_factor_gt           0.0268
_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^)+(0.0250P)^2^+1.7782P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0611
_refine_ls_wR_factor_ref         0.0648
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7351
_reflns_number_total             8584
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt04276d2.cif
_cod_data_source_block           as1142_p21n
_cod_depositor_comments
'Adding full bibliography for 7048404--7048410.cif.'
_cod_database_code               7048407
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_max   0.840
_shelx_estimated_absorpt_t_min   0.523
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C23(H23A,H23B), C20(H20A,H20B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C11(H11), C18(H18), C9(H9), C24(H24), C4(H4), C3(H3), C10(H10),
 C5(H5), C16(H16), C17(H17), C15(H15), C21(H21)
;
_shelx_res_checksum              95522
_olex2_submission_special_instructions 'No special instructions were received'