Preparation and Characterization of a Switchable Single-Component Chromium Trimerization Catalyst
Albahily, Khalid; Al-Baldawi, Danya; Gambarotta, Sandro; Duchateau, Robbert; Koç, Ece; Burchell, Tara J.; Organometallics 27 (2008) 5708–; doi:10.1021/om800563w

data_4072065
_publ_section_title
;
 Preparation and Characterization of a Switchable Single-Component
 Chromium Trimerization Catalyst
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              5708
_journal_paper_doi               10.1021/om800563w
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C41 H78 Al3 Cr N4 P2'
_chemical_formula_weight         821.95
_chemical_name_systematic
; 
 ? 
;
_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                 102.7670(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.9199(16)
_cell_length_b                   14.7620(12)
_cell_length_c                   18.1352(15)
_cell_measurement_reflns_used    8337
_cell_measurement_temperature    201(2)
_cell_measurement_theta_max      25.96
_cell_measurement_theta_min      2.32
_cell_volume                     4939.9(7)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.1409
_diffrn_reflns_av_sigmaI/netI    0.1270
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            42194
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    0.379
_exptl_absorpt_correction_T_max  0.9925
_exptl_absorpt_correction_T_min  0.9559
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            blue_purple
_exptl_crystal_density_diffrn    1.105
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1780
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.324
_refine_diff_density_rms         0.085
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     490
_refine_ls_number_reflns         8718
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.1579
_refine_ls_R_factor_gt           0.0648
_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^)+(0.0670P)^2^+2.3754P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1383
_refine_ls_wR_factor_ref         0.1737
_reflns_number_gt                4529
_reflns_number_total             8718
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800563w_si_002.cif
_cod_data_source_block           07068a
_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_database_code               4072065