Achiral Lanthanide Alkyl Complexes Bearing N,O Multidentate Ligands. Synthesis and Catalysis of Highly Heteroselective Ring-Opening Polymerization ofrac-Lactide
Liu, Xinli; Shang, Xiaomin; Tang, Tao; Hu, Ninghai; Pei, Fengkui; Cui, Dongmei; Chen, Xuesi; Jing, Xiabin; Organometallics 26 (2007) 2747–; doi:10.1021/om0700359

data_4073050
_publ_section_title
;
 Achiral Lanthanide Alkyl Complexes Bearing N,O Multidentate Ligands.
 Synthesis and Catalysis of Highly Heteroselective Ring-Opening
 Polymerization ofrac-Lactide
;
_journal_issue                   10
_journal_name_full               Organometallics
_journal_page_first              2747
_journal_paper_doi               10.1021/om0700359
_journal_volume                  26
_journal_year                    2007
_chemical_formula_sum            'C90 H160 N4 O6 Si2 Y2'
_chemical_formula_weight         1628.22
_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                78.9650(10)
_cell_angle_beta                 80.0250(10)
_cell_angle_gamma                76.9090(10)
_cell_formula_units_Z            1
_cell_length_a                   11.5635(10)
_cell_length_b                   11.8385(11)
_cell_length_c                   18.9809(17)
_cell_measurement_temperature    293(2)
_cell_volume                     2461.0(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.973
_diffrn_measured_fraction_theta_max 0.973
_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  0.0194
_diffrn_reflns_av_sigmaI/netI    0.0446
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            14356
_diffrn_reflns_theta_full        26.08
_diffrn_reflns_theta_max         26.08
_diffrn_reflns_theta_min         1.79
_exptl_absorpt_coefficient_mu    1.245
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.099
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             882
_exptl_crystal_size_max          0.403
_exptl_crystal_size_mid          0.268
_exptl_crystal_size_min          0.174
_refine_diff_density_max         0.422
_refine_diff_density_min         -0.313
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     518
_refine_ls_number_reflns         9493
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.0577
_refine_ls_R_factor_gt           0.0422
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0586P)^2^+0.5181P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0996
_refine_ls_wR_factor_ref         0.1069
_reflns_number_gt                7685
_reflns_number_total             9493
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om0700359si20070311_045755.cif
_cod_data_source_block           q178
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      p-1
_cod_database_code               4073050