From Unstable to Stable: Half-Metallocene Catalysts for Olefin Polymerization
Prabhuodeyara M. Gurubasavaraj; Herbert W. Roesky; Bijan Nekoueishahraki; Aritra Pal; Regine Herbst-Irmer; Inorganic Chemistry 47 (2008) 5324–5331; doi:10.1021/ic800198e

data_4305017
_publ_section_title
;
From Unstable to Stable: Half-Metallocene Catalysts for Olefin
Polymerization
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5324
_journal_page_last               5331
_journal_paper_doi               10.1021/ic800198e
_journal_volume                  47
_journal_year                    2008
_chemical_formula_sum            'C42 H65 Al N2 O Ti'
_chemical_formula_weight         688.84
_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                 96.790(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.0330(10)
_cell_length_b                   19.076(2)
_cell_length_c                   17.5190(10)
_cell_measurement_reflns_used    5010
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      58.502
_cell_measurement_theta_min      4.234
_cell_volume                     3993.1(6)
_computing_cell_refinement       'Bruker SAINT (V. 7.12A, Siemens 2003)'
_computing_data_collection       'Proteum (Version 1.40, Bruker 2002)'
_computing_data_reduction        'Bruker SAINT (V. 7.12A, Siemens 2003)'
_computing_molecular_graphics    'Bruker AXS SHELXTL (V. 6.12)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 5.602
_diffrn_measured_fraction_theta_full 0.969
_diffrn_measured_fraction_theta_max 0.969
_diffrn_measurement_device_type  'Bruker three circle diffractometer'
_diffrn_measurement_method       'phi and omega scan'
_diffrn_radiation_monochromator  'mirror system'
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0711
_diffrn_reflns_av_sigmaI/netI    0.0614
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            30327
_diffrn_reflns_theta_full        59.00
_diffrn_reflns_theta_max         59.00
_diffrn_reflns_theta_min         3.44
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.263
_exptl_absorpt_correction_T_max  0.8054
_exptl_absorpt_correction_T_min  0.6604
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.146
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1496
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.326
_refine_diff_density_min         -0.517
_refine_diff_density_rms         0.058
_refine_ls_extinction_coef       0.00044(10)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     446
_refine_ls_number_reflns         5577
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0730
_refine_ls_R_factor_gt           0.0508
_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^)+(0.0741P)^2^+1.7613P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1298
_refine_ls_wR_factor_ref         0.1442
_reflns_number_gt                4110
_reflns_number_total             5577
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic800198e-file002_2.cif
_cod_data_source_block           rh3
_cod_database_code               4305017