Unusual Si‒H Bond Activation and Formation of Cationic Scandium Amide Complexes from a Mono(amidinate)-Ligated Scandium Bis(silylamide) Complex and Their Performance in Isoprene Polymerization
Chen, Fei; Fan, Shimin; Wang, Yibin; Chen, Jue; Luo, Yunjie; Organometallics 31 (2012) 3730–; doi:10.1021/om3002119

data_4078288
_publ_section_title
;
 Unusual Si--H Bond Activation and Formation of Cationic Scandium Amide
 Complexes from a Mono(amidinate)-Ligated Scandium Bis(silylamide) Complex
 and Their Performance in Isoprene Polymerization
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              3730
_journal_paper_doi               10.1021/om3002119
_journal_volume                  31
_journal_year                    2012
_chemical_formula_moiety
'C47 H82 N4 O2 Sc Si4, C24 B F20, 0.5(C6 H14)'
_chemical_formula_sum            'C74 H89 B F20 N4 O2 Sc Si4'
_chemical_formula_weight         1614.62
_chemical_name_systematic
; 
? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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                83.313(5)
_cell_angle_beta                 81.325(5)
_cell_angle_gamma                79.149(4)
_cell_formula_units_Z            2
_cell_length_a                   12.0543(7)
_cell_length_b                   17.8419(11)
_cell_length_c                   19.6145(12)
_cell_measurement_reflns_used    14796
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.3
_cell_measurement_theta_min      3.0
_cell_volume                     4078.8(4)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalStructure
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0442
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            39926
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    0.240
_exptl_absorpt_correction_T_max  0.910
_exptl_absorpt_correction_T_min  0.795
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.315
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1678
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.80
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.937
_refine_diff_density_min         -1.174
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.125
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     955
_refine_ls_number_reflns         14857
_refine_ls_number_restraints     19
_refine_ls_restrained_S_all      1.126
_refine_ls_R_factor_all          0.1115
_refine_ls_R_factor_gt           0.0878
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1021P)^2^+3.8094P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2143
_refine_ls_wR_factor_ref         0.2318
_reflns_number_gt                11522
_reflns_number_total             14857
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om3002119_si_003.cif
_cod_data_source_block           shelxl
_cod_database_code               4078288