Versatility of the methyl-bipyrimidine-<i>N</i>-oxide ligand for the design of lanthanide single-molecule magnets.
Douib, Haiet; Lefeuvre, Bertrand; Flores Gonzalez, Jessica; Dorcet, Vincent; Pointillart, Fabrice; CrystEngComm 27 (2025) 7677–7688; doi:10.1039/d5ce00831j

data_7251009
_publ_section_title
;
 Versatility of the methyl-bipyrimidine-<i>N</i>-oxide ligand for the
 design of lanthanide single-molecule magnets.
;
_journal_issue                   47
_journal_name_full               CrystEngComm
_journal_page_first              7677
_journal_page_last               7688
_journal_paper_doi               10.1039/d5ce00831j
_journal_volume                  27
_journal_year                    2025
_chemical_absolute_configuration rm/ad/rmad/syn/unk/.
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C93 H86 F42 N4 O13 Yb2'
_chemical_formula_sum            'C93 H86 F42 N4 O13 Yb2'
_chemical_formula_weight         2611.73
_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
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_update_record
;
2025-08-22 deposited with the CCDC.	2025-10-14 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   20.1753(11)
_cell_length_b                   21.9101(12)
_cell_length_c                   23.9762(16)
_cell_measurement_reflns_used    9916
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      23.5092
_cell_measurement_theta_min      2.2796
_cell_measurement_wavelength     0.710730
_cell_volume                     10598.5(11)
_computing_cell_refinement       'Bruker APEX2 (Bruker, 2014)'
_computing_data_collection       'Bruker APEX2 (Bruker, 2014)'
_computing_data_reduction        'Bruker APEX2 (Bruker, 2014)'
_computing_molecular_graphics
;
   'SXGRAPH (L. Farrugia, 1999), Mercury (CSD, 2020)'
;
_computing_publication_material  'CRYSCALC (T. Roisnel, local program, 2020)'
_computing_structure_refinement  'SHELXL-2018_3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector                 CCD-LDI-APEX2
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'APEXII Bruker-AXS'
_diffrn_measurement_method       'CCD rotation images, thin slices'
_diffrn_orient_matrix_UB_11      -0.0444237
_diffrn_orient_matrix_UB_12      -0.0184895
_diffrn_orient_matrix_UB_13      -0.0075307
_diffrn_orient_matrix_UB_21      0.0160099
_diffrn_orient_matrix_UB_22      -0.0144776
_diffrn_orient_matrix_UB_23      -0.0371891
_diffrn_orient_matrix_UB_31      0.0150650
_diffrn_orient_matrix_UB_32      -0.0391362
_diffrn_orient_matrix_UB_33      0.0173151
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0478
_diffrn_reflns_av_unetI/netI     0.1116
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            47342
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.501
_diffrn_reflns_theta_min         2.280
_exptl_absorpt_coefficient_mu    1.887
_exptl_absorpt_correction_T_max  0.782
_exptl_absorpt_correction_T_min  0.586
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  [Sheldrick, G.M. (2014). SADABS Bruker AXS Inc., Madison, Wisconsin, USA]
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.637
_exptl_crystal_description       board
_exptl_crystal_F_000             5176
_exptl_crystal_size_max          0.600
_exptl_crystal_size_mid          0.220
_exptl_crystal_size_min          0.130
_refine_diff_density_max         2.888
_refine_diff_density_min         -1.139
_refine_diff_density_rms         0.140
_refine_ls_abs_structure_details
;
Flack x determined using 6054 quotients [(I+)-(I-)]/[(I+)+(I-)]
(Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.004(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1435
_refine_ls_number_reflns         24066
_refine_ls_number_restraints     256
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0926
_refine_ls_R_factor_gt           0.0571
_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^)+(0.0563P)^2^+2.2680P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1194
_refine_ls_wR_factor_ref         0.1345
_reflns_Friedel_coverage         0.842
_reflns_Friedel_fraction_full    0.990
_reflns_Friedel_fraction_max     0.979
_reflns_number_gt                17507
_reflns_number_total             24066
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d5ce00831j2.cif
_cod_data_source_block           SL14
_cod_depositor_comments
'Adding full bibliography for 7251008--7251017.cif.'
_cod_database_code               7251009
_shelx_res_checksum              71986
_shelx_fab_checksum              41042