High temperature spin crossover behaviour of mononuclear bis-(thiocyanato)iron(II) complexes with judiciously designed bidentate N-donor Schiff bases with varying substituents.
Bhar, Kishalay; Guo, Wenbin; Gonidec, Mathieu; Nikhil Raj M, Venkata; Bhatt, Surabhi; Perdih, Franc; Guionneau, Philippe; Chastanet, Guillaume; Sharma, Anuj K.; Dalton transactions (Cambridge, England : 2003) 51 (2022) 9302–9313; doi:10.1039/d2dt00416j

data_7710315
_publ_section_title
;
 High temperature spin crossover behaviour of mononuclear
 bis-(thiocyanato)iron(II) complexes with judiciously designed bidentate
 N-donor Schiff bases with varying substituents.
;
_journal_issue                   24
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9302
_journal_page_last               9313
_journal_paper_doi               10.1039/d2dt00416j
_journal_volume                  51
_journal_year                    2022
_chemical_formula_moiety         'C38 H26 Br2 Fe N6 S2'
_chemical_formula_sum            'C38 H26 Br2 Fe N6 S2'
_chemical_formula_weight         846.44
_space_group_crystal_system      tetragonal
_space_group_IT_number           92
_space_group_name_Hall           'P 4abw 2nw'
_space_group_name_H-M_alt        'P 41 21 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2019-07-18
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2020-01-23 deposited with the CCDC.	2022-05-24 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   17.834(4)
_cell_length_b                   17.834(4)
_cell_length_c                   12.571(3)
_cell_measurement_reflns_used    9927
_cell_measurement_temperature    450(2)
_cell_measurement_theta_max      25.49
_cell_measurement_theta_min      2.28
_cell_volume                     3998.2(16)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      450.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0937
_diffrn_reflns_av_unetI/netI     0.1269
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            74162
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.501
_diffrn_reflns_theta_min         1.982
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.514
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.5139
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.1271 before and 0.0701 after correction.
The Ratio of minimum to maximum transmission is 0.6896.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_description       block
_exptl_crystal_F_000             1696
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.06
_exptl_transmission_factor_max   0.7452
_exptl_transmission_factor_min   0.5139
_refine_diff_density_max         0.613
_refine_diff_density_min         -0.299
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details
;
 Flack x determined using 411 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.032(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.103
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     223
_refine_ls_number_reflns         74162
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.1943
_refine_ls_R_factor_gt           0.0892
_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^)+3.4387P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1176
_refine_ls_wR_factor_ref         0.1414
_reflns_Friedel_coverage         0.722
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                36157
_reflns_number_total             74162
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2dt00416j2.cif
_cod_data_source_block           327450_0ma
_cod_depositor_comments
'Adding full bibliography for 7710305--7710325.cif.'
_cod_original_cell_volume        3998(2)
_cod_database_code               7710315
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.864
_shelx_estimated_absorpt_t_min   0.584
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 1
 0
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
3.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C4(H4), C2(H2), C9(H9), C3(H3), C11(H11), C8(H8), C14(H14), C15(H15),
 C18(H18), C17(H17), C10(H10), C12(H12)
;
_shelx_res_checksum              56498
_olex2_submission_special_instructions 'No special instructions were received'