C1-Symmetric Zirconium Complexes of [ONNO′]-Type Salan Ligands: Accurate Control of Catalyst Activity, Isospecificity, and Molecular Weight in 1-Hexene Polymerization
Cohen, Ad; Kopilov, Jacob; Goldberg, Israel; Kol, Moshe; Organometallics 28 (2009) 1391–; doi:10.1021/om801058w

data_4068724
_publ_section_title
;
 C1-Symmetric Zirconium Complexes of [ONNO&#x2032;]-Type Salan Ligands:
 Accurate Control of Catalyst Activity, Isospecificity, and Molecular
 Weight in 1-Hexene Polymerization
;
_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              1391
_journal_paper_doi               10.1021/om801058w
_journal_volume                  28
_journal_year                    2009
_chemical_formula_moiety         '2(C38 H60 Br2 N2 O4 Zr), 3(C5 H12)'
_chemical_formula_sum            'C91 H156 Br4 N4 O8 Zr2'
_chemical_formula_weight         1936.28
_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                 113.2079(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   17.9143(4)
_cell_length_b                   15.1552(3)
_cell_length_c                   19.4486(5)
_cell_measurement_reflns_used    11327
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      27.88
_cell_measurement_theta_min      1.88
_cell_volume                     4852.93(19)
_computing_cell_refinement       Denzo
_computing_data_collection       'Collect, Nonius B.V.'
_computing_data_reduction        'Denzo and Scalepack'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      110(2)
_diffrn_detector_area_resol_mean 12.8
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '1 deg. \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  0.0890
_diffrn_reflns_av_sigmaI/netI    0.0939
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            45021
_diffrn_reflns_theta_full        27.88
_diffrn_reflns_theta_max         27.88
_diffrn_reflns_theta_min         1.88
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.913
_exptl_absorpt_correction_T_max  0.7623
_exptl_absorpt_correction_T_min  0.5976
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, 1995'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.325
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2028
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.570
_refine_diff_density_min         -0.619
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     489
_refine_ls_number_reflns         11493
_refine_ls_number_restraints     7
_refine_ls_restrained_S_all      1.030
_refine_ls_R_factor_all          0.1350
_refine_ls_R_factor_gt           0.0660
_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^)+(0.0613P)^2^+5.1072P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1295
_refine_ls_wR_factor_ref         0.1534
_reflns_number_gt                6747
_reflns_number_total             11493
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om801058w_si_002.cif
_cod_data_source_block           mk187
_cod_original_cell_volume        4852.92(19)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4068724