Symmetric and asymmetric ligands for Fe<sup>III</sup> spin crossover - the influence of the <i>C</i><sub>2</sub> axis.
Kelly, Conor T.; Cuza, Emmelyne; Pasquetti, Eoin; Quinn, Niall; Griffin, Michael; Nockemann, Peter; Müller-Bunz, Helge; Bruno-Colmenarez, Julia; Felton, Solveig; Lada, Zoi G.; Morgan, Grace G.; Dalton transactions (Cambridge, England : 2003) 54 (2025) 14522–14532; doi:10.1039/d5dt01833a

data_7719388
_publ_section_title
;
 Symmetric and asymmetric ligands for Fe<sup>III</sup> spin crossover -
 the influence of the <i>C</i><sub>2</sub> axis.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14522
_journal_page_last               14532
_journal_paper_doi               10.1039/d5dt01833a
_journal_volume                  54
_journal_year                    2025
_chemical_formula_moiety         'C37 H58 Fe N4 O2, Cl O4'
_chemical_formula_sum            'C37 H58 Cl Fe N4 O6'
_chemical_formula_weight         746.17
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     direct
_audit_creation_date             2025-06-04
_audit_creation_method
;
Olex2 1.5
(compiled 2025.05.31 svn.r86d253d1 for OlexSys, GUI svn.r7254)
;
_audit_update_record
;
2025-06-04 deposited with the CCDC.	2025-09-05 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 115.379(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.924(6)
_cell_length_b                   10.853(3)
_cell_length_c                   20.187(6)
_cell_measurement_reflns_used    6260
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.02
_cell_measurement_theta_min      2.18
_cell_volume                     3745.9(19)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2019/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS  (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0427
_diffrn_reflns_av_unetI/netI     0.0274
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            56942
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.999
_diffrn_reflns_theta_min         1.951
_exptl_absorpt_coefficient_mu    0.524
_exptl_absorpt_correction_T_max  0.9025
_exptl_absorpt_correction_T_min  0.8027
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_colour_primary    black
_exptl_crystal_density_diffrn    1.323
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1596
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.572
_refine_diff_density_min         -0.382
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     486
_refine_ls_number_reflns         7343
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0466
_refine_ls_R_factor_gt           0.0407
_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^)+(0.0545P)^2^+3.2417P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1033
_refine_ls_wR_factor_ref         0.1069
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6516
_reflns_number_total             7343
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5dt01833a2.cif
_cod_data_source_block           1-14_mor65
_cod_depositor_comments
'Adding full bibliography for 7719387--7719420.cif.'
_cod_original_cell_volume        3746(2)
_cod_database_code               7719388
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_max   0.903
_shelx_estimated_absorpt_t_min   0.859
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups, All C(H,H,H,H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 N2-C17A = N2-C17B = N1-C16A = N1-C16B
 1.48 with sigma of 0.02
 N2-C17B = N2A-C17A
 1.48 with sigma of 0.02
 Fe-N2 \\sim Fe-N2A
 with sigma of 0.02
 C17A-N2 \\sim C17A-N2A
 with sigma of 0.02
 C17B-N2 \\sim C17B-N2A
 with sigma of 0.02
 N2-C18 \\sim N2A-C18
 with sigma of 0.02
3. Others
 Sof(C16B)=Sof(H16C)=Sof(H16D)=Sof(C17B)=Sof(H17C)=Sof(H17D)=Sof(N2)=Sof(H2)=
 Sof(H18C)=Sof(H18D)=1-FVAR(1)
 Sof(C16A)=Sof(H16A)=Sof(H16B)=Sof(C17A)=Sof(H17A)=Sof(H17B)=Sof(H18A)=
 Sof(H18B)=Sof(N2A)=Sof(H2A)=FVAR(1)
4.a Ternary CH refined with riding coordinates:
 N2(H2), N2A(H2A)
4.b Secondary CH2 refined with riding coordinates:
 C16A(H16A,H16B), C17A(H17A,H17B), C16B(H16C,H16D), C17B(H17C,H17D), C18(H18C,
 H18D), C18(H18A,H18B), C19(H19A,H19B), C20(H20A,H20B), C21(H21A,H21B),
 C22(H22A,H22B)
4.c Aromatic/amide H refined with riding coordinates:
 C3(H3), C5(H5), C15(H15), C23(H23), C25(H25), C27(H27)
4.d Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C9(H9A,H9B,H9C), C10(H10A,H10B,H10C), C12(H12A,H12B,H12C),
 C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C31(H31A,H31B,H31C), C32(H32A,H32B,
 H32C), C33(H33A,H33B,H33C), C35(H35A,H35B,H35C), C36(H36A,H36B,H36C), C37(H37A,
 H37B,H37C)
;
_shelx_res_checksum              94095
_olex2_submission_special_instructions 'No special instructions were received'