Tuning ligand field strength with pendent Lewis acids: access to high spin iron hydrides
Kiernicki, John J.; Shanahan, James P.; Zeller, Matthias; Szymczak, Nathaniel K.; Chemical Science  (2019) –; doi:10.1039/C9SC00561G

data_1550978
_publ_section_title
;
 Tuning ligand field strength with pendent Lewis acids: access to high
 spin iron hydrides
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C9SC00561G
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety
'4(C41 H65 B2 Fe N5), 2.808(C4 H9 O2), 3(C4 H10 O2), 4(K)'
_chemical_formula_sum            'C187.23 H315.27 B8 Fe4 K4 N20 O11.62'
_chemical_formula_weight         3498.78
_chemical_properties_physical    Air-sensitive,Moisture-sensitive,Hygroscopic
_space_group_crystal_system      tetragonal
_space_group_IT_number           122
_space_group_name_Hall           'I -4 2bw'
_space_group_name_H-M_alt        'I -4 2 d'
_symmetry_space_group_name_Hall  'I -4 2bw'
_symmetry_space_group_name_H-M   'I -4 2 d'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2018-12-10 deposited with the CCDC.    2019-04-26 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   26.450(2)
_cell_length_b                   26.450(2)
_cell_length_c                   20.9410(19)
_cell_measurement_reflns_used    9521
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.0058
_cell_measurement_theta_min      2.9442
_cell_volume                     14650(2)
_computing_cell_refinement       'SAINT V8.37A (Bruker, 2016)'
_computing_data_collection       'Apex3 v2016.9-0 (Bruker, 2016)'
_computing_data_reduction        'SAINT V8.37A (Bruker, 2016)'
_computing_structure_refinement
;  
SHELXL-2017/1 (Sheldrick, 2017), 
SHELXLE Rev859 (H\"ubschle et al., 2011)
;
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker AXS D8 Quest CMOS diffractometer'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  'Triumph curved graphite crystal'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0796
_diffrn_reflns_av_unetI/netI     0.0453
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            102117
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.279
_diffrn_reflns_theta_min         3.018
_diffrn_source                   'sealed tube X-ray source'
_exptl_absorpt_coefficient_mu    0.291
_exptl_absorpt_correction_T_max  0.5644
_exptl_absorpt_correction_T_min  0.4855
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D.,
 J. Appl. Cryst. 48 (2015) 3-10
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    0.791
_exptl_crystal_description       plate
_exptl_crystal_F_000             3773
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.420
_exptl_crystal_size_mid          0.280
_exptl_crystal_size_min          0.130
_refine_diff_density_max         1.204
_refine_diff_density_min         -0.583
_refine_diff_density_rms         0.083
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.48(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     557
_refine_ls_number_reflns         9087
_refine_ls_number_restraints     652
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.1321
_refine_ls_R_factor_gt           0.0935
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1907P)^2^+6.0545P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2427
_refine_ls_wR_factor_ref         0.3014
_reflns_Friedel_coverage         0.873
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                6150
_reflns_number_total             9087
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9sc00561g2.cif
_cod_data_source_block           jk2177_0m_sq
_cod_original_cell_volume        14650(3)
_cod_database_code               1550978
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.888
_shelx_estimated_absorpt_t_max   0.963
_shelx_res_checksum              32219
_shelx_fab_checksum              43882