Rare earth metal complexes supported by 1,ω-dithiaalkanediyl-bridged bis(phenolato) ligands: synthesis, characterization and ring-opening polymerization catalysis of l-lactide
Ma, Haiyan; Spaniol, Thomas P.; Okuda, Jun; Dalton Transactions  (2003) 4770–4780; doi:10.1039/b311604b

data_7013669
_publ_section_title
;
 Rare earth metal complexes supported by 1,\w-dithiaalkanediyl-bridged
 bis(phenolato) ligands: synthesis, characterization and ring-opening
 polymerization catalysis of l-lactide
;
_journal_coden_ASTM              DTARAF
_journal_issue                   24
_journal_name_full               'Dalton Transactions'
_journal_page_first              4770
_journal_page_last               4780
_journal_paper_doi               10.1039/b311604b
_journal_year                    2003
_chemical_formula_sum            'C33 H56 N O3 S2 Sc Si2'
_chemical_formula_weight         680.05
_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                102.28(2)
_cell_angle_beta                 99.60(2)
_cell_angle_gamma                95.03(3)
_cell_formula_units_Z            2
_cell_length_a                   8.951(3)
_cell_length_b                   11.127(4)
_cell_length_c                   20.548(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      10.9
_cell_measurement_theta_min      9.3
_cell_volume                     1955.5(10)
_computing_cell_refinement       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_collection       'CAD4 Express (Enraf Nonius, 1994)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'CAD4 (Enraf nonius)'
_diffrn_measurement_method       'non-profiled omega/2theta 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  0.0736
_diffrn_reflns_av_sigmaI/netI    0.1007
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            15277
_diffrn_reflns_theta_full        25.98
_diffrn_reflns_theta_max         25.98
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        17
_diffrn_standards_interval_count 242
_diffrn_standards_interval_time  119
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.386
_exptl_absorpt_correction_T_max  0.9248
_exptl_absorpt_correction_T_min  0.6428
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   psi-scans
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.155
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             732
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.775
_refine_diff_density_min         -0.494
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         7643
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.1609
_refine_ls_R_factor_gt           0.0789
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1541P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1957
_refine_ls_wR_factor_ref         0.2630
_reflns_number_gt                3913
_reflns_number_total             7643
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b311604b.txt
_cod_data_source_block           hm8
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7013669
_diffrn_standards_corr_method    'STDANAL linear fit'
_diffrn_standards_corr_fact_max  1.201
_diffrn_standards_corr_fact_min  1.012