NNN-Tridentate Pyrrolyl Rare-Earth Metal Complexes: Structure and Catalysis on Specific Selective Living Polymerization of Isoprene
Wang, Lingfang; Liu, Dongtao; Cui, Dongmei; Organometallics 31 (2012) 6014–; doi:10.1021/om300049h

data_4078986
_publ_section_title
;
 NNN-Tridentate Pyrrolyl Rare-Earth Metal Complexes: Structure and
 Catalysis on Specific Selective Living Polymerization of Isoprene
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              6014
_journal_paper_doi               10.1021/om300049h
_journal_volume                  31
_journal_year                    2012
_chemical_formula_sum            'C26 H52 N3 O Si2 Y'
_chemical_formula_weight         567.80
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.7310(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.3630(17)
_cell_length_b                   10.3511(10)
_cell_length_c                   18.2635(18)
_cell_measurement_temperature    293(2)
_cell_volume                     3089.7(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0406
_diffrn_reflns_av_sigmaI/netI    0.0454
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            17766
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.40
_exptl_absorpt_coefficient_mu    1.986
_exptl_absorpt_correction_T_max  0.7549
_exptl_absorpt_correction_T_min  0.7288
_exptl_crystal_density_diffrn    1.221
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1216
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.411
_refine_diff_density_min         -0.217
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     304
_refine_ls_number_reflns         5474
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0520
_refine_ls_R_factor_gt           0.0352
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0432P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0763
_refine_ls_wR_factor_ref         0.0817
_reflns_number_gt                4347
_reflns_number_total             5474
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om300049h_si_002.cif
_cod_data_source_block           complex1b
_cod_original_sg_symbol_H-M      p21/n
_cod_database_code               4078986