Chromium Aryl Complexes with N-Donor Ligands as Catalyst Precursors for Selective Ethylene Trimerization
Ronellenfitsch, Mathias; Wadepohl, Hubert; Enders, Markus; Organometallics 33 (2014) 5758–; doi:10.1021/om500459k

data_4084000
_publ_section_title
;
 Chromium Aryl Complexes with N-Donor Ligands as Catalyst Precursors
 for Selective Ethylene Trimerization
;
_journal_issue                   20
_journal_name_full               Organometallics
_journal_page_first              5758
_journal_paper_doi               10.1021/om500459k
_journal_volume                  33
_journal_year                    2014
_chemical_formula_moiety         'C24 H27 Cl2 Cr N2 O'
_chemical_formula_sum            'C24 H27 Cl2 Cr N2 O'
_chemical_formula_weight         482.37
_chemical_properties_physical    air-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_block_code                en_mr14
_audit_creation_date             2014-04-28
_audit_update_record             'Mon Apr 28 17:11:57 CEST 2014'
_cell_angle_alpha                90
_cell_angle_beta                 105.224(11)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   24.855(10)
_cell_length_b                   8.321(3)
_cell_length_c                   22.327(9)
_cell_measurement_reflns_used    8179
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      32.08
_cell_measurement_theta_min      2.59
_cell_volume                     4456(3)
_computing_cell_refinement
;
SAINT 8.x (Bruker AXS, 1997-2012). Includes estimated systematic errors
 of the unit cell constants from Monte Carlo simulations.
;
_computing_data_collection       'SMART-5.631 (Bruker AXS, 2003)'
_computing_data_reduction        'SAINT 8.x (Bruker AXS, 1997-2011)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material
'encif (Wadepohl, 2009-13); encifer 1.4 (CCDC, 2011)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'SUPERFLIP (Palatinus, 2007-2009)'
_diffrn_ambient_environment      'perfluoro polyether oil'
_diffrn_ambient_temperature      100(1)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.19
_diffrn_detector_type            CCD-PXL-KAF2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.954
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker AXS Smart 1000'
_diffrn_measurement_method       '\f- and \w-scans'
_diffrn_measurement_specimen_support 'polyimid foil'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0419
_diffrn_reflns_av_unetI/netI     0.0270
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.954
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            56227
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.954
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.546
_diffrn_reflns_theta_min         1.891
_diffrn_source                   'sealed X-Ray tube (Mo)'
_diffrn_source_type              'fine focus tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.772
_exptl_absorpt_correction_T_max  0.9188
_exptl_absorpt_correction_T_min  0.8106
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements (Blessing 1995)
SADABS (Sheldrick & Bruker AXS, 2004-2008)
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.438
_exptl_crystal_description       block
_exptl_crystal_F_000             2008
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.616
_refine_diff_density_min         -0.315
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         7728
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0423
_refine_ls_R_factor_gt           0.0315
_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^)+(0.0347P)^2^+5.6495P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0758
_refine_ls_wR_factor_ref         0.0813
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6484
_reflns_number_total             7728
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om500459k_si_002.cif
_cod_data_source_block           en_mr14
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4084000
_audit_block_refno               1850
_audit_block_usercomment         mr170b
_shelxl_version_number           2014-3
_shelx_estimated_absorpt_t_max   0.927
_shelx_estimated_absorpt_t_min   0.927
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C17(H17A,H17B), C18(H18A,H18B), C19(H19A,H19B), C20(H20A,H20B), C21(H21A,
 H21B), C22(H22A,H22B), C23(H23A,H23B), C24(H24A,H24B), C25(H25A,H25B)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C13(H13), C14(H14), C15(H15), C16(H16)
;
_shelx_res_checksum              31783