Highly Selective Chromium(III) Ethylene Trimerization Catalysts with [NON] and [NSN] Heteroscorpionate Ligands
Zhang, Jun; Braunstein, Pierre; Hor, T. S. Andy; Organometallics 27 (2008) 4277–; doi:10.1021/om8005239

data_4072019
_publ_section_title
;
 Highly Selective Chromium(III) Ethylene Trimerization Catalysts with
 [NON] and [NSN] Heteroscorpionate Ligands
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              4277
_journal_paper_doi               10.1021/om8005239
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C20 H25 Cl3 Cr N5 O'
_chemical_formula_weight         509.80
_chemical_name_systematic
; 
 ? 
;
_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                 103.847(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0530(10)
_cell_length_b                   16.8310(16)
_cell_length_c                   13.9668(15)
_cell_measurement_reflns_used    1838
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      23.56
_cell_measurement_theta_min      2.26
_cell_volume                     2294.5(4)
_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      223(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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
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_diffrn_reflns_av_sigmaI/netI    0.0573
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            13206
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.93
_exptl_absorpt_coefficient_mu    0.870
_exptl_absorpt_correction_T_max  0.9660
_exptl_absorpt_correction_T_min  0.8452
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.476
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Colourless
_exptl_crystal_F_000             1052
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.419
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_refine_ls_extinction_method     none
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_refine_ls_matrix_type           full
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_refine_ls_number_reflns         4025
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_refine_ls_R_factor_all          0.0760
_refine_ls_R_factor_gt           0.0588
_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^)+(0.0459P)^2^+2.1335P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1186
_refine_ls_wR_factor_ref         0.1250
_reflns_number_gt                3311
_reflns_number_total             4025
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om8005239_si_001.cif
_cod_data_source_block           2
_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.

'_exptl_absorpt_correction_type' value 'Empirical'
changed to 'empirical' 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 'not measured' 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_database_code               4072019