The “pogo stick” complex [FeCp*{N(SiMe3)2}]: spin state properties, adduct formation with Lewis bases, and reactivity towards weakly Brønsted acidic protonated NHCs
Zinke, Julian; Bruhn, Clemens; Demeshko, Serhiy; Siemeling, Ulrich; Dalton Transactions 54 (2025) 5812–5828; doi:10.1039/D5DT00300H

data_7718195
_publ_section_title
;
 The &#x201C;pogo stick&#x201D; complex [FeCp*{N(SiMe3)2}]: spin state
 properties, adduct formation with Lewis bases, and reactivity towards
 weakly Br\/onsted acidic protonated NHCs
;
_journal_issue                   14
_journal_name_full               'Dalton Transactions'
_journal_page_first              5812
_journal_page_last               5828
_journal_paper_doi               10.1039/D5DT00300H
_journal_volume                  54
_journal_year                    2025
_chemical_formula_moiety         'C37 H51 Cl Fe N2, 0.5(C6 H6)'
_chemical_formula_sum            'C40 H54 Cl Fe N2'
_chemical_formula_weight         654.15
_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   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2024-08-07
_audit_creation_method
;
Olex2 1.5
(compiled 2024.02.16 svn.r378c4104 for OlexSys, GUI svn.r6928)
;
_audit_update_record
;
2025-02-25 deposited with the CCDC.	2025-03-03 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 102.915(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.6577(3)
_cell_length_b                   20.9198(4)
_cell_length_c                   15.6499(4)
_cell_measurement_reflns_used    31896
_cell_measurement_temperature    100
_cell_measurement_theta_max      70.38
_cell_measurement_theta_min      3.59
_cell_volume                     3720.10(16)
_computing_cell_refinement
;
X-Area Recipe 1.33.0.0 (STOE, 2015)
;
_computing_data_collection
;
X-Area Pilatus3_SV 1.31.150.0 (STOE, 2018)
;
_computing_data_reduction
;
X-Area Integrate 1.73.1.0 (STOE, 2018)
X-Area LANA 1.73.2.0 (STOE, 2018)
;
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material
;
STOE & Cie GmbH, X-Area, software package for collecting single-crystal or
multi-domain crystal data on STOE area-detector diffractometers, for image 
processing, for the correction and scaling of reflection intensities and 
for outlier rejection, version 1.83, Darmstadt 2018
;
_computing_structure_refinement  'SHELXL 2019/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT  (Sheldrick, 2015)'
_diffrn_ambient_temperature      100
_diffrn_detector                 Pilatus200K
_diffrn_detector_area_resol_mean 5.81
_diffrn_detector_type            'DECTRIS PILATUS 200K'
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_details
;
 1524 frames, detector distance = 40 mm
;
_diffrn_measurement_device       'Eulerian 4-circle diffractometer'
_diffrn_measurement_device_type  'STOE STADIVARI'
_diffrn_measurement_method       'rotation method, \w scans'
_diffrn_radiation_collimation    '1.2 mm, 0.6 diameter'
_diffrn_radiation_monochromator  'Graded multilayer mirror'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54186
_diffrn_reflns_av_R_equivalents  0.0380
_diffrn_reflns_av_unetI/netI     0.0329
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            25425
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        67.686
_diffrn_reflns_theta_max         68.976
_diffrn_reflns_theta_min         3.586
_diffrn_source                   Cu-Genix
_diffrn_source_current           0.600
_diffrn_source_power             0.030
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    4.109
_exptl_absorpt_correction_T_max  0.7612
_exptl_absorpt_correction_T_min  0.2862
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
STOE X-Red32, absorption correction by Gaussian integration, analogous to
P. Coppens, "The Evaluation of Absorption and Extinction in Single-Crystal
Structure Analysis", published in: F. R. Ahmed (Editor), "Crystallographic
Computing", Munksgaard, Copenhagen (1970), 255 - 270.
Afterwards scaling of reflection intensities was performed within STOE LANA.
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.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.168
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1404
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.478
_refine_diff_density_min         -0.330
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.097
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     410
_refine_ls_number_reflns         6837
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.097
_refine_ls_R_factor_all          0.0618
_refine_ls_R_factor_gt           0.0458
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0424P)^2^+4.9001P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1040
_refine_ls_wR_factor_ref         0.1150
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5657
_reflns_number_total             6837
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5dt00300h2.cif
_cod_data_source_block           sv0784
_cod_depositor_comments
'Adding full bibliography for 7718189--7718202.cif.'
_cod_database_code               7718195
_shelx_shelxl_version_number     2019/3
_shelx_estimated_absorpt_t_max   0.821
_shelx_estimated_absorpt_t_min   0.392
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H,H) groups
2. Restrained distances
 C40-C39
 1.395 with sigma of 0.001
 C39-C38
 1.395 with sigma of 0.001
3.a Ternary CH refined with riding coordinates:
 C20(H20), C23(H23), C32(H32), C35(H35)
3.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C16(H16), C17(H17), C18(H18), C28(H28), C29(H29), C30(H30),
 C38(H38), C39(H39), C40(H40)
3.c Idealised Me refined as rotating group:
 C9(H9A,H9B,H9C), C10(H10A,H10B,H10C), C11(H11A,H11B,H11C), C12(H12A,H12B,
 H12C), C13(H13A,H13B,H13C), C21(H21A,H21B,H21C), C22(H22A,H22B,H22C), C24(H24A,
 H24B,H24C), C25(H25A,H25B,H25C), C33(H33A,H33B,H33C), C34(H34A,H34B,H34C),
 C36(H36A,H36B,H36C), C37(H37A,H37B,H37C)
;
_shelx_res_checksum              14411
_shelx_hkl_checksum              972
_olex2_submission_special_instructions 'No special instructions were received'