A combined theoretical and experimental approach to determine the right choice of co-ligand to impart spin crossover in Fe(II) complexes based on 1,3,4-oxadiazole ligands.
Sundaresan, Sriram; Eppelsheimer, Julian; Gera, Esha; Wiener, Lukas; Carrella, Luca M.; Vignesh, Kuduva R.; Rentschler, Eva; Dalton transactions (Cambridge, England : 2003) 53 (2024) 10303–10317; doi:10.1039/d4dt01141d

data_7716243
_publ_section_title
;
 A combined theoretical and experimental approach to determine the right
 choice of co-ligand to impart spin crossover in Fe(II) complexes based on
 1,3,4-oxadiazole ligands.
;
_journal_issue                   24
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              10303
_journal_page_last               10317
_journal_paper_doi               10.1039/d4dt01141d
_journal_volume                  53
_journal_year                    2024
_chemical_formula_moiety         'C22 H24 B2 Fe N8 O, C2 H3 N'
_chemical_formula_sum            'C24 H27 B2 Fe N9 O'
_chemical_formula_weight         535.01
_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             2024-04-16
_audit_creation_method
;
Olex2 1.5
(compiled 2024.02.16 svn.r378c4104 for OlexSys, GUI svn.r6928)
;
_audit_update_record
;
2024-04-16 deposited with the CCDC.	2024-05-30 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.577(3)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   24.0862(11)
_cell_length_b                   10.9735(4)
_cell_length_c                   20.5959(8)
_cell_measurement_reflns_used    41267
_cell_measurement_temperature    173
_cell_measurement_theta_max      30.55
_cell_measurement_theta_min      1.98
_cell_volume                     5441.6(4)
_computing_cell_refinement
;
X-Area Recipe 1.36.0.0 (STOE, 2020)
;
_computing_data_collection
;
X-Area Pilatus3_SV 1.31.170.0 (STOE, 2020)
;
_computing_data_reduction
;
X-Area Integrate 1.78.3.0 (STOE, 2020)
X-Area LANA 1.83.8.0 (STOE, 2020)
;
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT  (Sheldrick, 2015)'
_diffrn_ambient_temperature      173
_diffrn_detector_area_resol_mean 5.81
_diffrn_detector_type            'DECTRIS PILATUS 100K'
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.891
_diffrn_measurement_details
;
 3112 frames, detector distance = 60 mm
;
_diffrn_measurement_device       'Eulerian 4-circle diffractometer'
_diffrn_measurement_device_type  'STOE STADIVARI'
_diffrn_measurement_method       'rotation method, \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_unetI/netI     0.0360
_diffrn_reflns_Laue_measured_fraction_full 0.979
_diffrn_reflns_Laue_measured_fraction_max 0.891
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            51502
_diffrn_reflns_point_group_measured_fraction_full 0.979
_diffrn_reflns_point_group_measured_fraction_max 0.891
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.760
_diffrn_reflns_theta_min         1.978
_exptl_absorpt_coefficient_mu    0.589
_exptl_absorpt_correction_T_max  0.9486
_exptl_absorpt_correction_T_min  0.8295
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
STOE LANA, absorption correction by scaling of reflection intensities.
J. Koziskova, F. Hahn, J. Richter, J. Kozisek, "Comparison of different
absorption corrections on the model structure of tetrakis(\m~2~-acetato)-
diaqua-di-copper(II)", Acta Chimica Slovaca, vol. 9, no. 2, 2016, pp. 136 - 140.
Afterwards a spherical absorption correction was performed within STOE LANA.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2224
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.097
_exptl_crystal_size_min          0.08
_exptl_crystal_size_rad          0.060
_refine_diff_density_max         0.794
_refine_diff_density_min         -0.848
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     338
_refine_ls_number_reflns         51502
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0917
_refine_ls_R_factor_gt           0.0626
_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^)+(0.1124P)^2^+5.5318P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1668
_refine_ls_wR_factor_ref         0.1924
_reflns_Friedel_coverage         0.000
_reflns_number_gt                36881
_reflns_number_total             51502
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4dt01141d2.cif
_cod_data_source_block           je-231-2
_cod_depositor_comments
'Adding full bibliography for 7716239--7716246.cif.'
_cod_database_code               7716243
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.4677(15)
 0.5323(15)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All B(H,H,H) groups, All C(H,H,H) groups
3.a Secondary CH2 refined with riding coordinates:
 C9(H9A,H9B), C10(H10A,H10B), C8(H8A,H8B)
3.b Aromatic/amide H refined with riding coordinates:
 C12(H12), C15(H15), C20(H20), C7(H7), C14(H14), C13(H13), C19(H19), C17(H17),
 C6(H6), C18(H18), C4(H4), C5(H5)
3.c Idealised Me refined as rotating group:
 B1(H1A,H1B,H1C), B2(H2A,H2B,H2C), C24(H24A,H24B,H24C)
;
_shelx_res_checksum              69948
_shelx_hkl_checksum              3659
_olex2_submission_special_instructions 'No special instructions were received'