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_4076315
_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            'C28 H33 Cl Cr N2'
_chemical_formula_weight         485.01
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_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                 89.983(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.1911(5)
_cell_length_b                   22.6160(7)
_cell_length_c                   15.8258(5)
_cell_measurement_reflns_used    73509
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     5079.2(3)
_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_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.988
_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  0.0931
_diffrn_reflns_av_sigmaI/netI    0.1068
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            47441
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         2.95
_exptl_absorpt_coefficient_mu    0.573
_exptl_absorpt_correction_T_max  0.8940
_exptl_absorpt_correction_T_min  0.8842
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            'Dark Orange'
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2048
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.430
_refine_diff_density_min         -0.570
_refine_diff_density_rms         0.091
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     590
_refine_ls_number_reflns         11578
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.1098
_refine_ls_R_factor_gt           0.0615
_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^)+(0.0477P)^2^+1.2257P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1122
_refine_ls_wR_factor_ref         0.1282
_reflns_number_gt                7761
_reflns_number_total             11578
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            om200641u_si_001.cif
_cod_data_source_block           complex3a
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4076315