Isomers of 2,2':6',2″-terpyridine and 2,6-dipyrazin-2-ylpyridine with aliphatic substituents: synthesis, coordination chemistry, and catalytic and anticancer activities.
Zhang, Guoqi; Mei, Haiyu; Kanina, Amy; Chocho, Marilyn; Hiyaev, Paulina; Cheng, Shu-Yuan; Neary, Michelle C.; Dalton transactions (Cambridge, England : 2003) 55 (2026) 2855–2867; doi:10.1039/d5dt02824h

data_7720225
_publ_section_title
;
 Isomers of 2,2':6',2&#x2033;-terpyridine and 2,6-dipyrazin-2-ylpyridine
 with aliphatic substituents: synthesis, coordination chemistry, and
 catalytic and anticancer activities.
;
_journal_issue                   7
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2855
_journal_page_last               2867
_journal_paper_doi               10.1039/d5dt02824h
_journal_volume                  55
_journal_year                    2026
_chemical_formula_moiety         'C17 H17 Cl2 Co N5, C7 H8'
_chemical_formula_sum            'C24 H25 Cl2 Co N5'
_chemical_formula_weight         513.32
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2025-10-22 deposited with the CCDC.	2026-01-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
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_cell_length_c                   16.105(3)
_cell_measurement_reflns_used    9928
_cell_measurement_temperature    90(2)
_cell_measurement_theta_max      30.50
_cell_measurement_theta_min      2.35
_cell_volume                     2419.3(7)
_computing_cell_refinement       'SAINT (8.34a) (Bruker, 2013)'
_computing_data_collection       'Apex2 (2014.9-1) (Bruker, 2014)'
_computing_data_reduction        'SAINT (8.34a) (Bruker, 2013)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      90(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0209
_diffrn_reflns_av_unetI/netI     0.0163
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            28401
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.516
_diffrn_reflns_theta_min         2.041
_exptl_absorpt_coefficient_mu    0.952
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_exptl_absorpt_correction_T_min  0.7874
_exptl_absorpt_correction_type   Muli-scan
_exptl_absorpt_process_details   'SADABS 2014/5 (Sheldrick, 2014)'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.409
_exptl_crystal_description       Block
_exptl_crystal_F_000             1060
_exptl_crystal_size_max          0.345
_exptl_crystal_size_mid          0.131
_exptl_crystal_size_min          0.084
_refine_diff_density_max         0.559
_refine_diff_density_min         -0.223
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details
; 
 Flack x determined using 3133 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.004(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         7382
_refine_ls_number_restraints     39
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0243
_refine_ls_R_factor_gt           0.0236
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0351P)^2^+0.5699P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0611
_refine_ls_wR_factor_ref         0.0617
_reflns_Friedel_coverage         0.795
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                7204
_reflns_number_total             7382
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5dt02824h2.cif
_cod_data_source_block           JF2517FMI222
_cod_original_cell_volume        2419.2(7)
_cod_database_code               7720225
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.735
_shelx_estimated_absorpt_t_max   0.924
_shelx_res_checksum              44105