Multisubstituted <i>C</i><sub>2</sub>-symmetric <i>ansa</i>-metallocenes bearing nitrogen heterocycles: influence of substituents on catalytic properties in propylene polymerization at higher temperatures.
Kulyabin, Pavel S.; Izmer, Vyatcheslav V.; Goryunov, Georgy P.; Sharikov, Mikhail I.; Kononovich, Dmitry S.; Uborsky, Dmitry V.; Canich, Jo Ann M.; Voskoboynikov, Alexander Z.; Dalton transactions (Cambridge, England : 2003) 50 (2021) 6170–6180; doi:10.1039/d1dt00645b

data_7707150
_publ_section_title
;
 Multisubstituted <i>C</i><sub>2</sub>-symmetric <i>ansa</i>-metallocenes
 bearing nitrogen heterocycles: influence of substituents on catalytic
 properties in propylene polymerization at higher temperatures.
;
_journal_issue                   18
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6170
_journal_page_last               6180
_journal_paper_doi               10.1039/d1dt00645b
_journal_volume                  50
_journal_year                    2021
_chemical_formula_moiety         'C60 H58 N2 Si Zr, 2(C7 H8)'
_chemical_formula_sum            'C74 H74 N2 Si Zr'
_chemical_formula_weight         1110.66
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2020-11-25 deposited with the CCDC.	2021-04-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.4286(13)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.9734(6)
_cell_length_b                   37.0630(19)
_cell_length_c                   12.9008(7)
_cell_measurement_reflns_used    999
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      3
_cell_volume                     5723.2(5)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL (Sheldrick, 2015b)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015a)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_type            'Bruker APEX II CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX DUO diffractometer'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0933
_diffrn_reflns_av_unetI/netI     0.0782
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       52
_diffrn_reflns_limit_k_min       -52
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            79037
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.573
_diffrn_reflns_theta_min         1.672
_exptl_absorpt_coefficient_mu    0.260
_exptl_absorpt_correction_T_max  0.4330
_exptl_absorpt_correction_T_min  0.3785
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.289
_exptl_crystal_description       prism
_exptl_crystal_F_000             2344
_exptl_crystal_size_max          0.270
_exptl_crystal_size_mid          0.210
_exptl_crystal_size_min          0.180
_refine_diff_density_max         1.396
_refine_diff_density_min         -0.699
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     686
_refine_ls_number_reflns         17505
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.015
_refine_ls_R_factor_all          0.0917
_refine_ls_R_factor_gt           0.0555
_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^)+(0.0584P)^2^+4.5479P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1257
_refine_ls_wR_factor_ref         0.1431
_reflns_Friedel_coverage         0.000
_reflns_number_gt                12041
_reflns_number_total             17505
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            d1dt00645b2.cif
_cod_data_source_block           pk1476
_cod_depositor_comments
'Adding full bibliography for 7707148--7707153.cif.'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7707150
_shelx_shelxl_version_number     2016/6
_shelx_estimated_absorpt_t_min   0.933
_shelx_estimated_absorpt_t_max   0.955
_shelx_res_checksum              50639