Scandium versus yttrium{amino-alkoxy-bis(phenolate)} complexes for the stereoselective ring-opening polymerization of racemic lactide and β-butyrolactone.
Chapurina, Yulia; Klitzke, Joice; Casagrande, Jr, Osvaldo de L; Awada, Mouhamad; Dorcet, Vincent; Kirillov, Evgueni; Carpentier, Jean-François; Dalton transactions (Cambridge, England : 2003) 43 (2014) 14322–14333; doi:10.1039/c4dt01206b

data_7031125
_publ_section_title
;
 Scandium versus yttrium{amino-alkoxy-bis(phenolate)} complexes for the
 stereoselective ring-opening polymerization of racemic lactide and
 \b-butyrolactone.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14322
_journal_page_last               14333
_journal_paper_doi               10.1039/c4dt01206b
_journal_volume                  43
_journal_year                    2014
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         '2(C45 H65 N2 O4 Si2 Y)'
_chemical_formula_sum            'C90 H130 N4 O8 Si4 Y2'
_chemical_formula_weight         1686.16
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2013-01-18T16:22:19-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                86.3270(10)
_cell_angle_beta                 86.6490(10)
_cell_angle_gamma                62.0640(10)
_cell_formula_units_Z            2
_cell_length_a                   11.8127(4)
_cell_length_b                   11.9689(3)
_cell_length_c                   36.3748(12)
_cell_measurement_reflns_used    9904
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      24.8
_cell_measurement_theta_min      2.22
_cell_measurement_wavelength     0.71073
_cell_volume                     4531.9(2)
_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 0.98
_diffrn_measured_fraction_theta_max 0.98
_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  0.0565
_diffrn_reflns_av_unetI/netI     0.0813
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -47
_diffrn_reflns_number            62991
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.93
_exptl_absorpt_coefficient_mu    1.381
_exptl_absorpt_correction_T_max  0.791
_exptl_absorpt_correction_T_min  0.677
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  [Sheldrick, G.M. (2002). SADABS Bruker AXS Inc., Madison, Wisconsin, USA]
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.236
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1792
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.33
_exptl_crystal_size_min          0.17
_refine_diff_density_max         1.592
_refine_diff_density_min         -1.635
_refine_diff_density_rms         0.11
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     870
_refine_ls_number_reflns         20403
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.1015
_refine_ls_R_factor_gt           0.0614
_refine_ls_shift/su_max          0.016
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0761P)^2^+6.0654P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1429
_refine_ls_wR_factor_ref         0.1616
_reflns_number_gt                14101
_reflns_number_total             20403
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt01206b2.cif
_cod_data_source_block           CY218
_cod_depositor_comments
'Adding full bibliography for 7031125--7031131.cif.'
_cod_database_code               7031125