C<sub>1</sub>-Symmetric Si-bridged (2-indenyl)(1-indenyl) ansa-metallocenes as efficient ethene/1-hexene copolymerization catalysts.
Uborsky, Dmitry V.; Mladentsev, Dmitry Y.; Guzeev, Bogdan A.; Borisov, Ilya S.; Vittoria, Antonio; Ehm, Christian; Cipullo, Roberta; Hendriksen, Coen; Friederichs, Nic; Busico, Vincenzo; Voskoboynikov, Alexander Z.; Dalton transactions (Cambridge, England : 2003) 49 (2020) 3015–3025; doi:10.1039/c9dt04896k

data_7703511
_publ_section_title
;
 C<sub>1</sub>-Symmetric Si-bridged (2-indenyl)(1-indenyl)
 ansa-metallocenes as efficient ethene/1-hexene copolymerization
 catalysts.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3015
_journal_page_last               3025
_journal_paper_doi               10.1039/c9dt04896k
_journal_volume                  49
_journal_year                    2020
_chemical_formula_moiety         'C24 H26 Cl2 Si Zr'
_chemical_formula_sum            'C24 H26 Cl2 Si Zr'
_chemical_formula_weight         504.66
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-07-03
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-12-25 deposited with the CCDC.	2020-02-12 downloaded from the CCDC.
;
_cell_angle_alpha                75.8230(10)
_cell_angle_beta                 80.9580(10)
_cell_angle_gamma                61.5860(10)
_cell_formula_units_Z            2
_cell_length_a                   9.3079(6)
_cell_length_b                   9.6561(6)
_cell_length_c                   13.8605(8)
_cell_measurement_reflns_used    7617
_cell_measurement_temperature    120
_cell_measurement_theta_max      30.60
_cell_measurement_theta_min      2.45
_cell_volume                     1061.11(11)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      120
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEX CCD area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0250
_diffrn_reflns_av_unetI/netI     0.0289
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            16548
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.000
_diffrn_reflns_theta_min         2.446
_diffrn_source                   'sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.835
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.7067
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2008/1 (Bruker,2008) was used for absorption correction. wR2(int) was 0.0484 before and 0.0360 after correction. The Ratio of minimum to maximum transmission is 0.9472. The \l/2 correction factor is 0.0015.'
_exptl_crystal_colour            orange
_exptl_crystal_colour_primary    orange
_exptl_crystal_density_diffrn    1.579
_exptl_crystal_description       prism
_exptl_crystal_F_000             516
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.909
_refine_diff_density_min         -0.413
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         5632
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0339
_refine_ls_R_factor_gt           0.0280
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0335P)^2^+0.6834P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0661
_refine_ls_wR_factor_ref         0.0690
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4996
_reflns_number_total             5632
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt04896k2.cif
_cod_data_source_block           a
_cod_depositor_comments
'Adding full bibliography for 7703511--7703512.cif.'
_cod_database_code               7703511
_shelxl_version_number           2014/6
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C5(H5), C6(H6), C7(H7), C8(H8), C13(H13), C14(H14), C15(H15), C16(H16)
2.b Idealised Me refined as rotating group:
 C19(H19A,H19B,H19C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C22(H22A,H22B,
 H22C), C23(H23A,H23B,H23C), C24(H24A,H24B,H24C)
;
_shelx_res_checksum              89475
_olex2_submission_special_instructions 'No special instructions were received'