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_7064302
_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         'C28 H23 N'
_chemical_formula_sum            'C28 H23 N'
_chemical_formula_weight         373.47
_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             2025-10-12
_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                 97.053(15)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.992(5)
_cell_length_b                   12.228(6)
_cell_length_c                   17.586(9)
_cell_measurement_reflns_used    9472
_cell_measurement_temperature    297.00
_cell_measurement_theta_max      27.00
_cell_measurement_theta_min      2.23
_cell_volume                     2132.4(19)
_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      297.00
_diffrn_detector_area_resol_mean 7.9
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.975
_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  0.0680
_diffrn_reflns_av_unetI/netI     0.0471
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.975
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            56226
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.975
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.258
_diffrn_reflns_theta_min         2.034
_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    0.067
_exptl_absorpt_correction_T_max  0.7455
_exptl_absorpt_correction_T_min  0.6855
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1183 before and 0.0710 after correction.
The Ratio of minimum to maximum transmission is 0.9195.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear yellowish white'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   yellowish
_exptl_crystal_colour_primary    white
_exptl_crystal_density_diffrn    1.163
_exptl_crystal_description       block
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.323
_refine_diff_density_min         -0.185
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.153
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     264
_refine_ls_number_reflns         4658
_refine_ls_number_restraints     225
_refine_ls_restrained_S_all      1.133
_refine_ls_R_factor_all          0.1681
_refine_ls_R_factor_gt           0.0997
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0737P)^2^+1.6048P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2084
_refine_ls_wR_factor_ref         0.2461
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2674
_reflns_number_total             4658
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5nj04746c2.cif
_cod_data_source_block           3o
_cod_depositor_comments
'Adding full bibliography for 7064300--7064310.cif.'
_cod_original_cell_volume        2132.6(19)
_cod_database_code               7064302
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.990
_shelx_estimated_absorpt_t_min   0.987
_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. Rigid body (RIGU) restrains
 All non-hydrogen atoms
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
3.a Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C10(H10), C11(H11), C13(H13),
 C14(H14), C16(H16), C17(H17), C19(H19), C20(H20), C22(H22), C23(H23), C25(H25),
  C26(H26)
3.b Idealised Me refined as rotating group:
 C27(H27A,H27B,H27C), C28(H28A,H28B,H28C)
;
_shelx_res_checksum              13410
_olex2_submission_special_instructions 'No special instructions were received'