Ethylene Oligomerization Promoted by a Silylated-SNS Chromium System
Albahily, Khalid; Gambarotta, Sandro; Duchateau, Robbert; Organometallics 30 (2011) 4655–; doi:10.1021/om200505a

data_4065012
_publ_section_title
;
 Ethylene Oligomerization Promoted by a Silylated-SNS Chromium System
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              4655
_journal_paper_doi               10.1021/om200505a
_journal_volume                  30
_journal_year                    2011
_chemical_formula_sum            'C21.5 H42 Cl2 Cr N S2 Si2'
_chemical_formula_weight         557.76
_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                 104.054(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.426(3)
_cell_length_b                   18.116(5)
_cell_length_c                   13.335(3)
_cell_measurement_reflns_used    167
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      23.28
_cell_measurement_theta_min      1.93
_cell_volume                     2912.0(13)
_computing_cell_refinement       'SMART, Bruker (2000)'
_computing_data_collection       'SMART, Bruker (2000)'
_computing_data_reduction        'XPREP, Bruker (2000)'
_computing_molecular_graphics    'SHELXTL, Bruker (2000)'
_computing_publication_material  'SHELXTL, Bruker (2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0315
_diffrn_reflns_av_sigmaI/netI    0.0213
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            24767
_diffrn_reflns_theta_full        23.28
_diffrn_reflns_theta_max         23.28
_diffrn_reflns_theta_min         1.93
_diffrn_standards_decay_%        <1
_exptl_absorpt_coefficient_mu    0.812
_exptl_absorpt_correction_T_max  0.8289
_exptl_absorpt_correction_T_min  0.7697
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2000)'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1184
_exptl_crystal_size_max          0.34
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.737
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     251
_refine_ls_number_reflns         4144
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0457
_refine_ls_R_factor_gt           0.0378
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0418P)^2^+5.4807P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0970
_refine_ls_wR_factor_ref         0.1028
_reflns_number_gt                3593
_reflns_number_total             4144
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om200505a_si_001.cif
_cod_data_source_block           sg3111
_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_cell_volume        2912.2(13)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_original_formula_sum        'C21.50 H42 Cl2 Cr N S2 Si2'
_cod_database_code               4065012