C‒H Bond Activation and Isoprene Polymerization by Rare-Earth-Metal Tetramethylaluminate Complexes Bearing Formamidinato N-Ancillary Ligands
Hamidi, Shima; Jende, Lars N.; Martin Dietrich, H.; Maichle-Mössmer, Cäcilia; Törnroos, Karl W.; Deacon, Glen B.; Junk, Peter C.; Anwander, Reiner; Organometallics 32 (2013) 1209–; doi:10.1021/om301010m

data_4080128
_publ_section_title
;
 C--H Bond Activation and Isoprene Polymerization by Rare-Earth-Metal
 Tetramethylaluminate Complexes Bearing Formamidinato N-Ancillary Ligands
;
_journal_issue                   5
_journal_name_full               Organometallics
_journal_page_first              1209
_journal_paper_doi               10.1021/om301010m
_journal_volume                  32
_journal_year                    2013
_chemical_formula_sum            'C33 H63 N4 O Si4 Y'
_chemical_formula_weight         733.14
_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                61.861(4)
_cell_angle_beta                 87.197(4)
_cell_angle_gamma                77.763(4)
_cell_formula_units_Z            4
_cell_length_a                   12.1707(6)
_cell_length_b                   19.6297(10)
_cell_length_c                   20.3094(10)
_cell_measurement_temperature    173(2)
_cell_volume                     4174.0(4)
_computing_cell_refinement       X-AREA
_computing_data_collection       X-AREA
_computing_data_reduction        X-AREA
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'STOE IPDS II'
_diffrn_measurement_method       oemga-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  0.0630
_diffrn_reflns_av_sigmaI/netI    0.0464
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            55191
_diffrn_reflns_theta_full        25.35
_diffrn_reflns_theta_max         25.35
_diffrn_reflns_theta_min         2.85
_exptl_absorpt_coefficient_mu    1.540
_exptl_absorpt_correction_T_max  0.73530
_exptl_absorpt_correction_T_min  0.63575
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   mulabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.167
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1568
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.388
_refine_diff_density_min         -0.616
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.433
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     849
_refine_ls_number_reflns         15293
_refine_ls_number_restraints     23
_refine_ls_restrained_S_all      1.434
_refine_ls_R_factor_all          0.0946
_refine_ls_R_factor_gt           0.0841
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0057P)^2^+6.7590P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1229
_refine_ls_wR_factor_ref         0.1256
_reflns_number_gt                13705
_reflns_number_total             15293
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om301010m_si_001.cif
_cod_data_source_block           1a
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4080128