Unsymmetrical N-heterocyclic carbenes with a 1,1'-ferrocenediyl backbone.
Rittinghaus, Stefan; Färber, Christian; Bruhn, Clemens; Siemeling, Ulrich; Dalton transactions (Cambridge, England : 2003) 43 (2014) 3508–3520; doi:10.1039/c3dt52669k

data_7029184
_publ_section_title
;
 Unsymmetrical N-heterocyclic carbenes with a 1,1'-ferrocenediyl backbone.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3508
_journal_page_last               3520
_journal_paper_doi               10.1039/c3dt52669k
_journal_volume                  43
_journal_year                    2014
_chemical_formula_sum            'C16 H16 Fe N2'
_chemical_formula_weight         292.16
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      61
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.082(2)
_cell_length_b                   13.8650(10)
_cell_length_c                   9.3820(7)
_cell_measurement_reflns_used    7364
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      25.46
_cell_measurement_theta_min      2.02
_cell_volume                     2612.3(4)
_computing_cell_refinement       'X-Area (Stoe & Cie. 2006)'
_computing_data_collection       'X-Area (Stoe & Cie. 2006)'
_computing_data_reduction        'X-Area (Stoe & Cie. 2006)'
_computing_molecular_graphics    'ORTEP3 win. (Farrugia 2008)'
_computing_publication_material  'PLATON (Spek 2011)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_detector                 'image plate (34 cm diameter)'
_diffrn_detector_area_resol_mean 6.67
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_details      ' 180 frames, detector distance = 135 mm'
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    '0.5 mm diameter, multiple pinhole'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1050
_diffrn_reflns_av_sigmaI/netI    0.0667
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            15758
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.03
_diffrn_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_source_current           32
_diffrn_source_power             1.60
_diffrn_source_voltage           50
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.140
_exptl_absorpt_correction_T_max  0.9698
_exptl_absorpt_correction_T_min  0.8111
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'X-red ver. 1.31 (Stoe & Cie. 2005)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.486
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.306
_refine_diff_density_min         -0.252
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.878
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     181
_refine_ls_number_reflns         2297
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.877
_refine_ls_R_factor_all          0.0674
_refine_ls_R_factor_gt           0.0342
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0220P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0583
_refine_ls_wR_factor_ref         0.0649
_reflns_number_gt                1538
_reflns_number_total             2297
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt52669k.txt
_cod_data_source_block           i0438
_cod_database_code               7029184