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_7064301
_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 O'
_chemical_formula_sum            'C20 H17 N5 O'
_chemical_formula_weight         343.39
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2025-06-15
_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                 94.760(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.5754(9)
_cell_length_b                   10.0125(7)
_cell_length_c                   12.8537(8)
_cell_measurement_reflns_used    9909
_cell_measurement_temperature    298.00
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      2.53
_cell_volume                     1741.1(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 0.991
_diffrn_measured_fraction_theta_max 0.968
_diffrn_measurement_device_type  CMOS-PHOTONII-7
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0719
_diffrn_reflns_av_unetI/netI     0.0475
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.968
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            41993
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.968
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.483
_diffrn_reflns_theta_min         2.531
_diffrn_source                   'X-ray Tube'
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6703
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1402 before and 0.0729 after correction.
The Ratio of minimum to maximum transmission is 0.8990.
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    1.310
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.209
_refine_diff_density_min         -0.179
_refine_diff_density_rms         0.039
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.169
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     237
_refine_ls_number_reflns         3862
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.169
_refine_ls_R_factor_all          0.1460
_refine_ls_R_factor_gt           0.0805
_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^)+(0.0406P)^2^+1.0063P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1348
_refine_ls_wR_factor_ref         0.1672
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2322
_reflns_number_total             3862
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5nj04746c2.cif
_cod_data_source_block           L2H
_cod_depositor_comments
'Adding full bibliography for 7064300--7064310.cif.'
_cod_database_code               7064301
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.993
_shelx_estimated_absorpt_t_min   0.985
_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 Rotating group:
 N2(H2A,H2B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C11(H11), C12(H12), C14(H14), C15(H15),
 C16(H16), C17(H17), C18(H18), C19(H19)
2.c Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C)
;
_shelx_res_checksum              85472
_olex2_submission_special_instructions 'No special instructions were received'