Selective Ethylene Oligomerization with Chromium Complexes Bearing Pyridine–Phosphine Ligands: Influence of Ligand Structure on Catalytic Behavior
Yang, Yun; Gurnham, Joanna; Liu, Boping; Duchateau, Robbert; Gambarotta, Sandro; Korobkov, Ilia; Organometallics 33 (2014) 5749–; doi:10.1021/om5003683

data_4084028
_publ_section_title
;
 Selective Ethylene Oligomerization with Chromium Complexes Bearing
 Pyridine--Phosphine Ligands: Influence of Ligand Structure on
 Catalytic Behavior
;
_journal_issue                   20
_journal_name_full               Organometallics
_journal_page_first              5749
_journal_paper_doi               10.1021/om5003683
_journal_volume                  33
_journal_year                    2014
_chemical_formula_sum            'C25 H31 Cl3 Cr N2 O1.5 P'
_chemical_formula_weight         572.84
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 106.654(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.5191(8)
_cell_length_b                   17.7924(11)
_cell_length_c                   14.4355(10)
_cell_measurement_reflns_used    5108
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      27.89
_cell_measurement_theta_min      2.29
_cell_volume                     2834.5(3)
_computing_cell_refinement       'APEX II, Bruker (2009)'
_computing_data_collection       'APEX II, Bruker (2009)'
_computing_data_reduction        'XPREP, Bruker (2009)'
_computing_molecular_graphics    'SHELXTL, Bruker (2004)'
_computing_publication_material  'SHELXTL, Bruker (2004)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.1252
_diffrn_reflns_av_sigmaI/netI    0.0732
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            25857
_diffrn_reflns_theta_full        21.49
_diffrn_reflns_theta_max         21.49
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.765
_exptl_absorpt_correction_T_max  0.9924
_exptl_absorpt_correction_T_min  0.8746
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2003)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.342
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1188
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.710
_refine_diff_density_min         -0.397
_refine_diff_density_rms         0.101
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         3205
_refine_ls_number_restraints     50
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.1020
_refine_ls_R_factor_gt           0.0653
_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^)+(0.1009P)^2^+4.8136P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1590
_refine_ls_wR_factor_ref         0.1803
_reflns_number_gt                2213
_reflns_number_total             3205
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om5003683_si_001.cif
_cod_data_source_block           complex_2a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

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)/n
_cod_original_formula_sum        'C25 H31 Cl3 Cr N2 O1.50 P'
_cod_database_code               4084028