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_4084003
_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         'C25 H31 Cl2 Cr N2 O, C4 H8 O'
_chemical_formula_sum            'C29 H39 Cl2 Cr N2 O2'
_chemical_formula_weight         570.52
_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     dual
_atom_sites_solution_secondary   difmap
_audit_block_code                en_mr15
_audit_creation_date             2014-04-25
_audit_update_record             'Fri Apr 25 10:35:16 CEST 2014'
_cell_angle_alpha                90
_cell_angle_beta                 106.459(11)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   25.392(14)
_cell_length_b                   14.420(9)
_cell_length_c                   15.624(10)
_cell_measurement_reflns_used    8119
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.26
_cell_measurement_theta_min      2.72
_cell_volume                     5486(6)
_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    'SHELXT (Sheldrick, 2013)'
_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 0.992
_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  0.0741
_diffrn_reflns_av_unetI/netI     0.0496
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            61781
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.741
_diffrn_reflns_theta_min         1.974
_diffrn_source                   'sealed X-Ray tube (Mo)'
_diffrn_source_type              'fine focus tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.641
_exptl_absorpt_correction_T_max  0.7459
_exptl_absorpt_correction_T_min  0.6869
_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            black
_exptl_crystal_density_diffrn    1.381
_exptl_crystal_description       irregular
_exptl_crystal_F_000             2408
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.18
_refine_diff_density_max         1.293
_refine_diff_density_min         -0.634
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         7766
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0908
_refine_ls_R_factor_gt           0.0518
_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^)+(0.0613P)^2^+15.7660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1236
_refine_ls_wR_factor_ref         0.1459
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5310
_reflns_number_total             7766
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om500459k_si_002.cif
_cod_data_source_block           en_mr15
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4084003
_audit_block_refno               1857
_audit_block_usercomment         mr175
_shelxl_version_number           2014-3
_shelx_estimated_absorpt_t_max   0.893
_shelx_estimated_absorpt_t_min   0.856
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C11(H11A,H11B), C12(H12A,H12B), C13(H13A,H13B), C14(H14A,H14B), C15(H15A,
 H15B), C23(H23A,H23B), C24(H24A,H24B), C25(H25A,H25B), C26(H26A,H26B),
 C27(H27A,H27B), C28(H28A,H28B), C29(H29A,H29B), C30(H30A,H30B)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C17(H17), C18(H18), C20(H20),
 C21(H21)
2.c Idealised Me refined as rotating group:
 C22(H22A,H22B,H22C)
;
_shelx_res_checksum              187