(Butadiene)metallocene/B(C6F5)3 Pathway to Catalyst Systems for Stereoselective Methyl Methacrylate Polymerization: Evidence for an Anion Dependent Metallocene Catalyzed Polymerization Process
Joachim W. Strauch; Jean-Luc Fauré; Stéphane Bredeau; Cun Wang; Gerald Kehr; Roland Fröhlich; Heinrich Luftmann; Gerhard Erker; Journal of the American Chemical Society 126 (2004) 2089–2104; doi:10.1021/ja035739y

data_4112248
_publ_section_title
;
 (Butadiene)metallocene/B(C6F5)3 Pathway to Catalyst Systems for
 Stereoselective Methyl Methacrylate Polymerization: Evidence for an Anion
 Dependent Metallocene Catalyzed Polymerization Process
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2089
_journal_page_last               2104
_journal_paper_doi               10.1021/ja035739y
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C19 H22 Zr'
_chemical_formula_weight         341.59
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                84.10(1)
_cell_angle_beta                 88.18(1)
_cell_angle_gamma                80.42(1)
_cell_formula_units_Z            2
_cell_length_a                   7.504(1)
_cell_length_b                   7.611(1)
_cell_length_c                   13.860(1)
_cell_measurement_temperature    198(2)
_cell_volume                     776.32(16)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V. ,1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & MInor, 1997)'
_computing_molecular_graphics    'Diamond (Brandenburg, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      198(2)
_diffrn_measured_fraction_theta_full 0.937
_diffrn_measured_fraction_theta_max 0.937
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode Nonius FR591'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.024
_diffrn_reflns_av_sigmaI/netI    0.0489
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            5632
_diffrn_reflns_theta_full        28.73
_diffrn_reflns_theta_max         28.73
_diffrn_reflns_theta_min         2.73
_exptl_absorpt_coefficient_mu    0.696
_exptl_absorpt_correction_T_max  0.9336
_exptl_absorpt_correction_T_min  0.9028
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SORTAV (Blessing, 1995 & 1997)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.461
_exptl_crystal_description       block
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.429
_refine_diff_density_min         -0.489
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    'refined as riding atoms'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     185
_refine_ls_number_reflns         3774
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0443
_refine_ls_R_factor_gt           0.0352
_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^)+(0.0272P)^2^+0.5392P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0791
_refine_ls_wR_factor_ref         0.0833
_reflns_number_gt                3276
_reflns_number_total             3774
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja035739ysi20030422_120215.cif
_cod_data_source_block           erk1881
_cod_original_cell_volume        776.33(16)
_cod_database_code               4112248