Hetero-bimetallic complexes of pyridine-/pyrazine-2-carboxamide ligands: synthesis, structure, redox properties and magnetism
Pandey, Sharmila; Mukhopadhyay, Narottam; Lloret, Francesc; Mukherjee, Rabindranath; New Journal of Chemistry 50 (2026) 2721–2731; doi:10.1039/D5NJ03831F

data_7064239
_publ_section_title
;
 Hetero-bimetallic complexes of pyridine-/pyrazine-2-carboxamide ligands:
 synthesis, structure, redox properties and magnetism
;
_journal_issue                   6
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              2721
_journal_page_last               2731
_journal_paper_doi               10.1039/D5NJ03831F
_journal_volume                  50
_journal_year                    2026
_chemical_formula_moiety         'C33 H27 Cl Co N12 Ni O3, H2 O'
_chemical_formula_sum            'C33 H29 Cl Co N12 Ni O4'
_chemical_formula_weight         810.77
_space_group_crystal_system      orthorhombic
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2025-12-14
_audit_creation_method
;
Olex2 1.5
(compiled 2025.07.13 svn.rb7424aed for OlexSys, GUI svn.r7314)
;
_audit_update_record
;
2025-12-14 deposited with the CCDC.	2025-12-23 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   18.257(5)
_cell_length_b                   16.417(5)
_cell_length_c                   22.303(5)
_cell_measurement_reflns_used    5908
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.36
_cell_measurement_theta_min      2.14
_cell_volume                     6685(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART APEX'
_computing_data_reduction        'Bruker SAINT PLUS'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SIR97(Altomare, et. al. 1999)'
_diffrn_ambient_temperature      100.15
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0912
_diffrn_reflns_av_unetI/netI     0.0650
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            32938
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.024
_diffrn_reflns_theta_max         25.024
_diffrn_reflns_theta_min         2.140
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    1.199
_exptl_absorpt_correction_T_max  0.8895
_exptl_absorpt_correction_T_min  0.7954
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            green
_exptl_crystal_colour_primary    green
_exptl_crystal_density_diffrn    1.611
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3320
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.728
_refine_diff_density_min         -0.392
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     480
_refine_ls_number_reflns         5904
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0741
_refine_ls_R_factor_gt           0.0475
_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^)+(0.0497P)^2^+3.2057P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1049
_refine_ls_wR_factor_ref         0.1208
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4256
_reflns_number_total             5904
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5nj03831f2.cif
_cod_data_source_block           29augc
_cod_database_code               7064239
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.889
_shelx_estimated_absorpt_t_min   0.795
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 O1W-H1WB = O1W-H1WA
 0.85 with sigma of 0.02
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C7(H7), C10(H10), C11(H11), C12(H12), C13(H13),
 C14(H14), C18(H18), C21(H21), C22(H22), C23(H23), C24(H24), C25(H25), C29(H29),
  C32(H32), C33(H33)
3.b Idealised Me refined as rotating group:
 C9(H9A,H9B,H9C), C20(H20A,H20B,H20C), C31(H31A,H31B,H31C)
;
_shelx_res_checksum              5014
_olex2_submission_special_instructions 'No special instructions were received'