Indenyl Functionalized N-Heterocyclic Carbene Complexes of Chromium: Syntheses, Structures, and Reactivity Studies Relevant to Ethylene Oligomerization and Polymerization
Conde-Guadano, Susana; Danopoulos, Andreas A.; Pattacini, Roberto; Hanton, Martin; Tooze, Robert P.; Organometallics 31 (2012) 1643–; doi:10.1021/om200641u

data_4076316
_publ_section_title
;
 Indenyl Functionalized N-Heterocyclic Carbene Complexes of Chromium:
 Syntheses, Structures, and Reactivity Studies Relevant to Ethylene
 Oligomerization and Polymerization
;
_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              1643
_journal_paper_doi               10.1021/om200641u
_journal_volume                  31
_journal_year                    2012
_chemical_formula_sum            'C56 H66 Cl2 Cr2 N4 O'
_chemical_formula_weight         986.03
_space_group_IT_number           206
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-I 2b 2c 3'
_symmetry_space_group_name_H-M   'I a -3'
_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            24
_cell_length_a                   31.7161(5)
_cell_length_b                   31.7161(5)
_cell_length_c                   31.7161(5)
_cell_measurement_reflns_used    25409
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     31903.6(9)
_computing_cell_refinement
;
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)' 
;
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
;
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'  
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SHELXS
_diffrn_ambient_temperature      153(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Bruker-Nonius Roper CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.2128
_diffrn_reflns_av_sigmaI/netI    0.1813
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       34
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            60412
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.550
_exptl_absorpt_correction_T_max  0.9319
_exptl_absorpt_correction_T_min  0.9171
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.232
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             12480
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_platon_squeeze_details
;
;
_refine_diff_density_max         0.379
_refine_diff_density_min         -0.404
_refine_diff_density_rms         0.077
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.173
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     300
_refine_ls_number_reflns         4696
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.173
_refine_ls_R_factor_all          0.2179
_refine_ls_R_factor_gt           0.1354
_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^)+(0.0730P)^2^+239.6238P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2492
_refine_ls_wR_factor_ref         0.2844
_reflns_number_gt                2943
_reflns_number_total             4696
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            om200641u_si_001.cif
_cod_data_source_block           complex4a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Cubic' changed to 'cubic' according
to /home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

2021-12-16
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_sg_symbol_H-M      Ia-3
_cod_original_formula_sum        'C168 H198 Cl6 Cr6 N12 O3'
_cod_original_formula_units_Z    8
_cod_original_formula_weight     2958.08
_cod_database_code               4076316