Chiral Ansa Metallocenes with Cp Ring-Fused to Thiophenes and Pyrroles: Syntheses, Crystal Structures, and Isotactic Polypropylene Catalysts
John A. Ewen; Michael J. Elder; Robert L. Jones; Arnold L. Rheingold; Louise M. Liable-Sands; Roger D. Sommer; Journal of the American Chemical Society 123 (2001) 4763–4773; doi:10.1021/ja004266h

data_4115560
_publ_section_title
;
 Chiral Ansa Metallocenes with Cp Ring-Fused to Thiophenes and Pyrroles:
 Syntheses, Crystal Structures, and Isotactic Polypropylene Catalysts
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4763
_journal_page_last               4773
_journal_paper_doi               10.1021/ja004266h
_journal_volume                  123
_journal_year                    2001
_chemical_formula_sum            'C35 H36 Cl4 S2 Si Zr'
_chemical_formula_weight         781.87
_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                96.9974(7)
_cell_angle_beta                 106.8513(5)
_cell_angle_gamma                100.2661(3)
_cell_formula_units_Z            2
_cell_length_a                   11.7096(2)
_cell_length_b                   12.6751(2)
_cell_length_c                   12.7721(2)
_cell_measurement_temperature    173(2)
_cell_volume                     1754.64(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.915
_diffrn_measured_fraction_theta_max 0.915
_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  0.0297
_diffrn_reflns_av_sigmaI/netI    0.0293
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            16715
_diffrn_reflns_theta_full        28.42
_diffrn_reflns_theta_max         28.42
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    0.796
_exptl_absorpt_correction_T_max  0.8259
_exptl_absorpt_correction_T_min  0.6467
_exptl_absorpt_correction_type   'empirical from SADABS'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.480
_exptl_crystal_description       block
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.746
_refine_diff_density_min         -1.400
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.959
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     388
_refine_ls_number_reflns         8065
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.959
_refine_ls_R_factor_all          0.0440
_refine_ls_R_factor_gt           0.0410
_refine_ls_shift/su_max          0.020
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1926
_refine_ls_wR_factor_ref         0.2026
_reflns_number_gt                7603
_reflns_number_total             8065
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja004266h_3.cif
_cod_data_source_block           hmnt12
_cod_original_cell_volume        1754.65(3)
_cod_database_code               4115560