Dinuclear palladium(ii) complexes of N-(imidazo[1,5-a]pyridin-1-yl)picolinimidamides: highly active catalysts for C–C and C–P bond formation
Rayasingh, Amlan Ranjan; Manivannan, Vadivelu; New Journal of Chemistry 50 (2026) 5541–5550; doi:10.1039/D5NJ04746C

data_7064306
_publ_section_title
;
 Dinuclear palladium(ii) complexes of
 N-(imidazo[1,5-a]pyridin-1-yl)picolinimidamides: highly active catalysts
 for C--C and C--P bond formation
;
_journal_issue                   13
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              5541
_journal_page_last               5550
_journal_paper_doi               10.1039/D5NJ04746C
_journal_volume                  50
_journal_year                    2026
_chemical_formula_moiety         'C20 H17 N5'
_chemical_formula_sum            'C20 H17 N5'
_chemical_formula_weight         327.39
_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'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2025-09-26
_audit_creation_method
;
Olex2 1.5
(compiled 2023.08.24 svn.re1ec1418 for OlexSys, GUI svn.r6817)
;
_audit_update_record
;
2025-10-16 deposited with the CCDC.	2026-03-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.9090(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   8.0457(3)
_cell_length_b                   17.7155(6)
_cell_length_c                   23.5310(8)
_cell_measurement_reflns_used    9866
_cell_measurement_temperature    298.00
_cell_measurement_theta_max      24.95
_cell_measurement_theta_min      2.30
_cell_volume                     3352.1(2)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_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    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      298.00
_diffrn_detector_area_resol_mean 7.9
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0584
_diffrn_reflns_av_unetI/netI     0.0285
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            76157
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.043
_diffrn_reflns_theta_max         25.043
_diffrn_reflns_theta_min         2.299
_diffrn_source                   'X-ray Tube'
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6960
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1449 before and 0.0694 after correction.
The Ratio of minimum to maximum transmission is 0.9340.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear dark yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   dark
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_description       block
_exptl_crystal_F_000             1376
_exptl_crystal_size_max          0.7
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.218
_refine_diff_density_min         -0.206
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.108
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     453
_refine_ls_number_reflns         5922
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.108
_refine_ls_R_factor_all          0.0771
_refine_ls_R_factor_gt           0.0512
_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^)+(0.0438P)^2^+1.3352P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1110
_refine_ls_wR_factor_ref         0.1293
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4342
_reflns_number_total             5922
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5nj04746c2.cif
_cod_data_source_block           L4H
_cod_depositor_comments
'Adding full bibliography for 7064300--7064310.cif.'
_cod_database_code               7064306
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.992
_shelx_estimated_absorpt_t_min   0.946
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C3(H3), C4(H4), C5(H5), C11(H11), C12(H12), C14(H14), C15(H15),
 C16(H16), C17(H17), C18(H18), C19(H19), C22(H22), C23(H23), C24(H24), C25(H25),
  C30(H30), C31(H31), C32(H32), C33(H33), C35(H35), C36(H36), C38(H38), C39(H39)
2.b X=CH2 refined with riding coordinates:
 N5(H5A,H5B), N10(H10A,H10B)
2.c Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C), C40(H40A,H40B,H40C)
;
_shelx_res_checksum              18528
_olex2_submission_special_instructions 'No special instructions were received'