Crystallographic Revelation of the Role of AlMe3(in MAO) in Cr [NNN] Pyrazolyl Catalyzed Ethylene Trimerization
Zhang, Jun; Li, Aifang; Hor, T. S. Andy; Organometallics 28 (2009) 2935–; doi:10.1021/om9002347

data_4069514
_publ_section_title
;
 Crystallographic Revelation of the Role of AlMe3(in MAO) in Cr [NNN]
 Pyrazolyl Catalyzed Ethylene Trimerization
;
_journal_issue                   10
_journal_name_full               Organometallics
_journal_page_first              2935
_journal_paper_doi               10.1021/om9002347
_journal_volume                  28
_journal_year                    2009
_chemical_formula_sum            'C21 H29 Al Cl2 Cr N5'
_chemical_formula_weight         501.37
_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                 99.425(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.2839(12)
_cell_length_b                   8.9960(6)
_cell_length_c                   14.6015(10)
_cell_measurement_reflns_used    2821
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      24.02
_cell_measurement_theta_min      2.53
_cell_volume                     2369.3(3)
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0437
_diffrn_reflns_av_sigmaI/netI    0.0526
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            16343
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.13
_exptl_absorpt_coefficient_mu    0.764
_exptl_absorpt_correction_T_max  0.9276
_exptl_absorpt_correction_T_min  0.8262
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            BLUE
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             1044
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.110
_refine_diff_density_min         -0.300
_refine_diff_density_rms         0.116
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     277
_refine_ls_number_reflns         5444
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.0935
_refine_ls_R_factor_gt           0.0704
_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^)+(0.1026P)^2^+2.8366P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1841
_refine_ls_wR_factor_ref         0.1971
_reflns_number_gt                3941
_reflns_number_total             5444
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om9002347_si_002.cif
_cod_data_source_block           8377a
_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 2.4.2 from 2011-04-26.

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)/c
_cod_database_code               4069514