Reduction chemistry yields stable and soluble divalent lanthanide tris(pyrazolyl)borate complexes.
Chowdhury, Tajrian; Evans, Matthew J.; Coles, Martyn P.; Bailey, Anna G.; Peveler, William J.; Wilson, Claire; Farnaby, Joy H.; Chemical communications (Cambridge, England) 59 (2023) 2134–2137; doi:10.1039/d2cc03189b

data_7131263
_publ_section_title
;
 Reduction chemistry yields stable and soluble divalent lanthanide
 tris(pyrazolyl)borate complexes.
;
_journal_issue                   15
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              2134
_journal_page_last               2137
_journal_paper_doi               10.1039/d2cc03189b
_journal_volume                  59
_journal_year                    2023
_chemical_formula_moiety         'C26 H36 B2 Eu N12 O2'
_chemical_formula_sum            'C26 H36 B2 Eu N12 O2'
_chemical_formula_weight         722.25
_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   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2022-03-09
_audit_creation_method
;
Olex2 1.5-beta
(compiled 2021.12.09 svn.r5202d8cf for OlexSys, GUI svn.r6439)
;
_audit_update_record
;
2022-03-22 deposited with the CCDC.	2022-12-20 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 97.5340(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.2076(4)
_cell_length_b                   15.3147(6)
_cell_length_c                   20.1892(8)
_cell_measurement_reflns_used    9874
_cell_measurement_temperature    150
_cell_measurement_theta_max      28.27
_cell_measurement_theta_min      2.41
_cell_volume                     3128.9(2)
_computing_cell_refinement       'SAINT V8.37A (Bruker-AXS, 2016)'
_computing_data_collection       'APEX3 Ver. 2016.9-0 (Bruker-AXS, 2016)'
_computing_data_reduction        'APEX3 Ver. 2016.9-0 (Bruker-AXS, 2016)'
_computing_molecular_graphics    'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      150
_diffrn_detector                 'charge integrating pixel array detector'
_diffrn_detector_area_resol_mean 7.4074
_diffrn_detector_type            'Bruker PHOTON II'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Bruker D8 VENTURE'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_collimation    'focusing mirrors'
_diffrn_radiation_monochromator  'multilayer mirror optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0534
_diffrn_reflns_av_unetI/netI     0.0296
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            26061
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.288
_diffrn_reflns_theta_min         2.412
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_type              'INCOATEC I\ms 3.0'
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.050
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6508
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.0711 before and 0.0600 after correction.
The Ratio of minimum to maximum transmission is 0.8727.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_description       block
_exptl_crystal_F_000             1460
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.440
_refine_diff_density_min         -0.412
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     213
_refine_ls_number_reflns         3887
_refine_ls_number_restraints     51
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0205
_refine_ls_R_factor_gt           0.0186
_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^)+(0.0169P)^2^+2.1982P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0458
_refine_ls_wR_factor_ref         0.0464
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3690
_reflns_number_total             3887
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2cc03189b2.cif
_cod_data_source_block           1_Eu_THF
_cod_depositor_comments
'Adding full bibliography for 7131257--7131266.cif.'
_cod_database_code               7131263
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.887
_shelx_estimated_absorpt_t_min   0.735
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All B(H) groups, All C(H) groups, All C(H,H) groups, All C(H,H,H,H) groups
2. Restrained distances
 C12-C11 \\sim C12A-C11A \\sim C13-C12 \\sim C12A-C13 \\sim C11A-C10 \\sim
C11-C10
 with sigma of 0.02
3. Uiso/Uaniso restraints and constraints
C11 \\sim C12 \\sim C11A \\sim C12A: within 1.7A with sigma of 0.02 and sigma
for terminal atoms of 0.04 within 1.7A
4. Others
 Fixed Sof: H10A(0.7) H10B(0.7) H10C(0.3) H10D(0.3) C11(0.7) H11A(0.7)
 H11B(0.7) C12(0.7) H12A(0.7) H12B(0.7) H13A(0.7) H13B(0.7) H13C(0.3) H13D(0.3)
 C11A(0.3) H11C(0.3) H11D(0.3) C12A(0.3) H12C(0.3) H12D(0.3)
5.a Ternary CH refined with riding coordinates:
 B1(H1)
5.b Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B), C10(H10C,H10D), C11(H11A,H11B), C12(H12A,H12B), C13(H13A,
 H13B), C13(H13C,H13D), C11A(H11C,H11D), C12A(H12C,H12D)
5.c Aromatic/amide H refined with riding coordinates:
 C1(H1A), C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C8(H8), C9(H9)
;
_shelx_res_checksum              26576
_shelx_hkl_checksum              45815
_olex2_submission_special_instructions 'No special instructions were received'