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_7131259
_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, C4 H8 O'
_chemical_formula_sum            'C30 H44 B2 Eu N12 O3'
_chemical_formula_weight         794.35
_space_group_crystal_system      orthorhombic
_space_group_IT_number           36
_space_group_name_Hall           'C 2c -2'
_space_group_name_H-M_alt        'C m c 21'
_atom_sites_solution_hydrogens   mixed
_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                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.5364(6)
_cell_length_b                   16.0680(6)
_cell_length_c                   15.1359(8)
_cell_measurement_reflns_used    3680
_cell_measurement_temperature    150
_cell_measurement_theta_max      23.63
_cell_measurement_theta_min      2.32
_cell_volume                     3535.3(3)
_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 0.997
_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  0.0843
_diffrn_reflns_av_unetI/netI     0.1026
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            16321
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.320
_diffrn_reflns_theta_min         1.889
_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    1.824
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6372
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.0939 before and 0.0681 after correction.
The Ratio of minimum to maximum transmission is 0.8545.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.492
_exptl_crystal_description       block
_exptl_crystal_F_000             1620
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.03
_refine_diff_density_max         1.001
_refine_diff_density_min         -0.620
_refine_diff_density_rms         0.114
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.989
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         4511
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      0.992
_refine_ls_R_factor_all          0.0867
_refine_ls_R_factor_gt           0.0449
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0291P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0798
_refine_ls_wR_factor_ref         0.0929
_reflns_Friedel_coverage         0.910
_reflns_Friedel_fraction_full    0.990
_reflns_Friedel_fraction_max     0.979
_reflns_number_gt                3015
_reflns_number_total             4511
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2cc03189b2.cif
_cod_data_source_block           1_Eu_THF_s
_cod_depositor_comments
'Adding full bibliography for 7131257--7131266.cif.'
_cod_database_code               7131259
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 1.01(4)
 -0.01(4)
2. Fixed Uiso
 At 1.2 times of:
  All B(H) groups, All C(H) groups, All C(H,H) groups
3. Restrained distances
 C18_$1-C18 \\sim C18-C17 \\sim C18_$1-C17_$1
 with sigma of 0.01
4. Uiso/Uaniso restraints and constraints
C18 \\sim C18 \\sim C17 \\sim C17: within 1.7A with sigma of 0.02 and sigma for
terminal atoms of 0.04 within 1.7A
5.a Riding coordinates:
 B1(H1A), B2(H2A)
5.b Secondary CH2 refined with riding coordinates:
 C14(H14A,H14B), C15(H15A,H15B), C13(H13A,H13B), C16(H16A,H16B), C18(H18A,
 H18B), C17(H17A,H17B)
5.c Aromatic/amide H refined with riding coordinates:
 C9(H9), C6(H6), C4(H4), C1(H1), C12(H12), C7(H7), C2(H2), C3(H3), C11(H11),
 C8(H8), C10(H10), C5(H5)
;
_shelx_res_checksum              11071
_shelx_hkl_checksum              17591
_olex2_submission_special_instructions 'No special instructions were received'