Yttrium– and Aluminum–Bis(phenolate)pyridine Complexes: Catalysts and Model Compounds of the Intermediates for the Stereoselective Ring-Opening Polymerization of Racemic Lactide and β-Butyrolactone
Klitzke, Joice S.; Roisnel, Thierry; Kirillov, Evgeny; Casagrande, Osvaldo de L.; Carpentier, Jean-François; Organometallics 33 (2014) 309–; doi:10.1021/om401047r

data_4082524
_publ_section_title
;
 Yttrium-- and Aluminum--Bis(phenolate)pyridine Complexes: Catalysts and
 Model Compounds of the Intermediates for the Stereoselective Ring-Opening
 Polymerization of Racemic Lactide and \b-Butyrolactone
;
_journal_issue                   1
_journal_name_full               Organometallics
_journal_page_first              309
_journal_paper_doi               10.1021/om401047r
_journal_volume                  33
_journal_year                    2014
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C49 H67 N2 O4 Si2 Y'
_chemical_formula_sum            'C49 H67 N2 O4 Si2 Y'
_chemical_formula_weight         893.14
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2011-11-22T15:21:47-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 110.122(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.896(2)
_cell_length_b                   25.405(3)
_cell_length_c                   15.536(2)
_cell_measurement_reflns_used    9958
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.01
_cell_measurement_theta_min      2.32
_cell_measurement_wavelength     0.71073
_cell_volume                     4779.3(11)
_computing_cell_refinement       'Bruker APEX2 (Bruker, 2006)'
_computing_data_collection       'Bruker APEX2 (Bruker, 2006)'
_computing_data_reduction        'Bruker APEX2 (Bruker, 2006)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material
;
           WinGX publication routines (Farrugia, 1999),
           CRYSCAL (T. Roisnel, local program)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'APEXII, Bruker-AXS'
_diffrn_measurement_method       'CCD rotation images, thin slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0531
_diffrn_reflns_av_unetI/netI     0.0536
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            42223
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.94
_exptl_absorpt_coefficient_mu    1.314
_exptl_absorpt_correction_T_max  0.607
_exptl_absorpt_correction_T_min  0.509
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  [Sheldrick, G.M. (2002). SADABS Bruker AXS Inc., Madison, Wisconsin, USA]
;
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.241
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1896
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.46
_exptl_crystal_size_min          0.38
_refine_diff_density_max         1.397
_refine_diff_density_min         -0.993
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     512
_refine_ls_number_reflns         10851
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0742
_refine_ls_R_factor_gt           0.0518
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0643P)^2^+5.6222P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1261
_refine_ls_wR_factor_ref         0.136
_reflns_number_gt                8360
_reflns_number_total             10851
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om401047r_si_002.cif
_cod_data_source_block           complex1
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4082524