New Iminophosphonamide Chromium(II) Complexes as Highly Active Polymer-Free Ethylene Oligomerization Catalysts
Albahily, Khalid; Ahmed, Zeeshan; Gambarotta, Sandro; Koç, Ece; Duchateau, Robbert; Korobkov, Ilia; Organometallics 30 (2011) 6022–; doi:10.1021/om2008474

data_4065494
_publ_section_title
;
 New Iminophosphonamide Chromium(II) Complexes as Highly Active
 Polymer-Free Ethylene Oligomerization Catalysts
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              6022
_journal_paper_doi               10.1021/om2008474
_journal_volume                  30
_journal_year                    2011
_chemical_formula_sum            'C25 H56.5 Cl2 Cr2 N6 O0.25 P2'
_chemical_formula_weight         682.10
_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                 92.078(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   16.680(3)
_cell_length_b                   16.182(3)
_cell_length_c                   26.027(5)
_cell_measurement_reflns_used    9844
_cell_measurement_temperature    201(2)
_cell_measurement_theta_max      26.39
_cell_measurement_theta_min      2.32
_cell_volume                     7020(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      201(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0723
_diffrn_reflns_av_sigmaI/netI    0.0744
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            44235
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         2.32
_exptl_absorpt_coefficient_mu    0.887
_exptl_absorpt_correction_T_max  0.9165
_exptl_absorpt_correction_T_min  0.8425
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2000)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.291
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2900
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.924
_refine_diff_density_min         -0.418
_refine_diff_density_rms         0.106
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
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_refine_ls_number_parameters     694
_refine_ls_number_reflns         12711
_refine_ls_number_restraints     28
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.1083
_refine_ls_R_factor_gt           0.0665
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0550P)^2^+30.4886P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1603
_refine_ls_wR_factor_ref         0.1814
_reflns_number_gt                8268
_reflns_number_total             12711
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om2008474_si_002.cif
_cod_data_source_block           sada
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'n/a' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_original_formula_sum        'C25 H56.50 Cl2 Cr2 N6 O0.25 P2'
_cod_database_code               4065494