A Stable Planar-Chiral N-Heterocyclic Carbene with a 1,1'-Ferrocenediyl Backbone.
Petrov, Alex R.; Derheim, Anatoli; Oetzel, Jan; Leibold, Michael; Bruhn, Clemens; Scheerer, Stefan; Oßwald, Steffen; Winter, Rainer F.; Siemeling, Ulrich; Inorganic chemistry 54 (2015) 6657–6670; doi:10.1021/acs.inorgchem.5b01064

data_4343394
_publ_section_title
;
 A Stable Planar-Chiral N-Heterocyclic Carbene with a 1,1'-Ferrocenediyl
 Backbone.
;
_journal_issue                   13
_journal_name_full               'Inorganic chemistry'
_journal_page_first              6657
_journal_page_last               6670
_journal_paper_doi               10.1021/acs.inorgchem.5b01064
_journal_volume                  54
_journal_year                    2015
_chemical_formula_sum            'C59 H92 Fe2 N4 O'
_chemical_formula_weight         985.06
_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'
_symmetry_space_group_name_Hall  '-P 2yn'
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_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 96.622(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.2320(3)
_cell_length_b                   21.6146(8)
_cell_length_c                   22.6191(6)
_cell_measurement_reflns_used    23808
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.95
_cell_measurement_theta_min      1.81
_cell_volume                     5454.7(3)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_details      ' 144 frames, detector distance = 133 mm'
_diffrn_measurement_device       '2-circle goniometer'
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_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '1.2, 0.6 mm diameter, multiple pinhole'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_polarisn_norm  270
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0400
_diffrn_reflns_av_unetI/netI     0.0365
_diffrn_reflns_laue_measured_fraction_full 0.997
_diffrn_reflns_laue_measured_fraction_max 0.982
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_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            28548
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.982
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_diffrn_reflns_theta_max         25.404
_diffrn_reflns_theta_min         1.307
_diffrn_source                   'Genix Mo HF'
_diffrn_source_current           1.000
_diffrn_source_power             0.050
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.574
_exptl_absorpt_correction_T_max  0.9536
_exptl_absorpt_correction_T_min  0.9201
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'X-red ver. 1.58 (Stoe & Cie. 2012)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.199
_exptl_crystal_description       block
_exptl_crystal_F_000             2136
_exptl_crystal_size_max          0.150
_exptl_crystal_size_mid          0.140
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.532
_refine_diff_density_min         -0.367
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     619
_refine_ls_number_reflns         9882
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0590
_refine_ls_R_factor_gt           0.0387
_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^)+(0.0447P)^2^+2.8126P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0883
_refine_ls_wR_factor_ref         0.0976
_reflns_Friedel_coverage         0.000
_reflns_number_gt                7457
_reflns_number_total             9882
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ic5b01064_si_006.cif
_cod_data_source_block           i2133
_cod_depositor_comments
'Adding full bibliography for 4343389--4343397.cif.'
_cod_database_code               4343394
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.919
_shelx_estimated_absorpt_t_max   0.956
_shelx_res_checksum              98852
_shelx_hkl_checksum              24025