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_7064300
_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         '2(C20 H17 N5 O)'
_chemical_formula_sum            'C40 H34 N10 O2'
_chemical_formula_weight         686.77
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2025-06-13
_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                103.728(7)
_cell_angle_beta                 91.311(7)
_cell_angle_gamma                104.029(8)
_cell_formula_units_Z            2
_cell_length_a                   11.8050(10)
_cell_length_b                   11.9329(10)
_cell_length_c                   13.5763(12)
_cell_measurement_reflns_used    1639
_cell_measurement_temperature    297
_cell_measurement_theta_max      22.1940
_cell_measurement_theta_min      2.5550
_cell_volume                     1795.8(3)
_computing_cell_refinement       'CrysAlisPro 1.171.40.23a (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.40.23a (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.40.23a (Rigaku OD, 2018)'
_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      297
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.2760
_diffrn_detector_type            Eos
_diffrn_measured_fraction_theta_full 0.9992
_diffrn_measured_fraction_theta_max 0.8605
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w    -26.00   8.00   1.00   10.66    --  -17.56 -77.00  90.00   34
  2  \w     41.00  67.00   1.00   10.66    --   20.76-178.00 120.00   26
  3  \w     30.00  63.00   1.00   10.66    --   20.76 -99.00 -30.00   33
  4  \w      7.00  90.00   1.00   10.66    --   20.76  57.00  90.00   83
  5  \w    -48.00  11.00   1.00   10.66    --   20.76 -57.00-180.00   59
  6  \w    -20.00  54.00   1.00   10.66    --   20.76 -99.00-120.00   74
  7  \w    -48.00  30.00   1.00   10.66    --   20.76 -57.00 -60.00   78
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Single source at offset/far, Eos'
_diffrn_measurement_method       '\w scans'
_diffrn_measurement_specimen_support 'Mitegen 50um'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0168801000
_diffrn_orient_matrix_UB_12      0.0616064000
_diffrn_orient_matrix_UB_13      0.0013003000
_diffrn_orient_matrix_UB_21      0.0598210000
_diffrn_orient_matrix_UB_22      -0.0007118000
_diffrn_orient_matrix_UB_23      0.0040110000
_diffrn_orient_matrix_UB_31      -0.0004531000
_diffrn_orient_matrix_UB_32      -0.0144589000
_diffrn_orient_matrix_UB_33      -0.0538137000
_diffrn_radiation_collimation    0.3
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0369
_diffrn_reflns_av_unetI/netI     0.0960
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11759
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        24.998
_diffrn_reflns_theta_max         24.998
_diffrn_reflns_theta_min         2.198
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_current           24.0
_diffrn_source_power             1.2
_diffrn_source_target            Mo
_diffrn_source_type              'SuperNova (Mo) X-ray Source'
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.29710
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.40.23a (Rigaku Oxford Diffraction, 2018)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_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    1.270
_exptl_crystal_description       needle
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.233
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.043
_refine_ls_extinction_coef       0.0103(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     472
_refine_ls_number_reflns         6303
_refine_ls_number_restraints     348
_refine_ls_restrained_S_all      0.997
_refine_ls_R_factor_all          0.1661
_refine_ls_R_factor_gt           0.0745
_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^)+(0.0739P)^2^+0.5483P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1679
_refine_ls_wR_factor_ref         0.2329
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2800
_reflns_number_total             6303
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5nj04746c2.cif
_cod_data_source_block           L1H
_cod_depositor_comments
'Adding full bibliography for 7064300--7064310.cif.'
_cod_database_code               7064300
_shelx_shelxl_version_number     2018/3
_chemical_oxdiff_formula         CHNO
_chemical_oxdiff_usercomment     Mo
_shelx_estimated_absorpt_t_max   0.996
_shelx_estimated_absorpt_t_min   0.988
_diffrn_oxdiff_ac4_digest_frames
;
01f979b8b812d38d609286615115674173000275114
;
_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. Uiso/Uaniso restraints and constraints
All non-hydrogen atoms have similar U: within 2A with sigma of 0.04 and sigma
for terminal atoms of 0.08 within 2A
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C3(H3), C4(H4), C9(H9), C10(H10), C11(H11), C12(H12), C15(H15),
 C16(H16), C17(H17), C18(H18), C2(H2), C21(H21), C22(H22), C23(H23), C24(H24),
 C29(H29), C30(H30), C31(H31), C32(H32), C35(H35), C36(H36), C37(H37), C38(H38)
3.b X=CH2 refined with riding coordinates:
 N2(H2A,H2B), N7(H7A,H7B)
3.c Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C), C40(H40A,H40B,H40C)
;
_shelx_res_checksum              96384
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 2.848
_oxdiff_exptl_absorpt_empirical_full_min 0.425