Dipyridinophane ligands – synthesis and coordination study
Kuncová, Lucie; Lazarová, Jana; Kotek, Jan; Kubíček, Vojtěch; Hermann, Petr; RSC Advances 16 (2026) 18220–18231; doi:10.1039/D6RA00469E

data_7251857
_publ_section_title
;
 Dipyridinophane ligands -- synthesis and coordination study
;
_journal_issue                   20
_journal_name_full               'RSC Advances'
_journal_page_first              18220
_journal_page_last               18231
_journal_paper_doi               10.1039/D6RA00469E
_journal_volume                  16
_journal_year                    2026
_chemical_formula_moiety         'C18 H18 N4 Ni O4, 2(H2 O)'
_chemical_formula_sum            'C18 H22 N4 Ni O6'
_chemical_formula_weight         449.10
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2025-12-16 deposited with the CCDC.	2026-03-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 107.7570(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   29.7755(11)
_cell_length_b                   9.6626(3)
_cell_length_c                   13.6057(5)
_cell_measurement_reflns_used    9939
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      28.2679
_cell_measurement_theta_min      2.8495
_cell_volume                     3728.0(2)
_computing_cell_refinement       'SAINT V8.40B (Bruker AXS LLC, 2019)'
_computing_data_collection       'Bruker Instrument Service v8.5.1.2 Release'
_computing_data_reduction        'SAINT V8.40B (Bruker AXS LLC, 2019)'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'XT, VERSION 2018/2'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 7.391
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device       'KAPPA diffractometer'
_diffrn_measurement_device_type  'Bruker D8 QUEST'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'multilayer mirror'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0195
_diffrn_reflns_av_unetI/netI     0.0124
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       39
_diffrn_reflns_limit_h_min       -39
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            34853
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.276
_diffrn_reflns_theta_min         2.227
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'INCOATEC I\mS'
_exptl_absorpt_coefficient_mu    1.087
_exptl_absorpt_correction_T_max  0.76
_exptl_absorpt_correction_T_min  0.68
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Krause, L., Herbst-Irmer, R., Sheldrick, G. M., Stalke, D. (2015).
"Comparison of silver and molybdenum microfocus X-ray sources for
single-crystal structure determination"
J. Appl. Cryst. 48, 3-10.
doi:10.1107/S1600576714022985
;
_exptl_crystal_colour            'deep purle'
_exptl_crystal_density_diffrn    1.600
_exptl_crystal_description       prism
_exptl_crystal_F_000             1872
_exptl_crystal_size_max          0.370
_exptl_crystal_size_mid          0.313
_exptl_crystal_size_min          0.266
_refine_diff_density_max         0.419
_refine_diff_density_min         -0.386
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.066
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         4607
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.066
_refine_ls_R_factor_all          0.0226
_refine_ls_R_factor_gt           0.0223
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0219P)^2^+5.1077P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0568
_refine_ls_wR_factor_ref         0.0570
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4514
_reflns_number_total             4607
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d6ra00469e2.cif
_cod_data_source_block           py2n2_karboxnib
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-Scan' was
changed to 'multi-scan' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 8170 2020-07-09 18:12:32Z antanas 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7251857
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.689
_shelx_estimated_absorpt_t_max   0.761
_shelx_res_checksum              14009