Synthesis, characterization and catalytic activity of lithium and sodium iminophenoxide complexes towards ring-opening polymerization of l-lactide.
Lu, Wei-Yi; Hsiao, Mon-Wei; Hsu, Sodio C. N.; Peng, Wei-Te; Chang, Ya-Ju; Tsou, Yu-Chi; Wu, Ting-Yi; Lai, Yi-Chun; Chen, Yun; Chen, Hsuan-Ying; Dalton transactions (Cambridge, England : 2003) 41 (2012) 3659–3667; doi:10.1039/c2dt12063a

data_7018512
_publ_section_title
;
 Synthesis, characterization and catalytic activity of lithium and sodium
 iminophenoxide complexes towards ring-opening polymerization of
 l-lactide.
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3659
_journal_page_last               3667
_journal_paper_doi               10.1039/c2dt12063a
_journal_volume                  41
_journal_year                    2012
_chemical_formula_moiety         'C64 H64 N4 Na4 O10'
_chemical_formula_sum            'C64 H64 N4 Na4 O10'
_chemical_formula_weight         1141.15
_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                94.865(2)
_cell_angle_beta                 98.374(2)
_cell_angle_gamma                99.712(2)
_cell_formula_units_Z            4
_cell_length_a                   12.3496(2)
_cell_length_b                   22.1400(5)
_cell_length_c                   24.1563(5)
_cell_measurement_reflns_used    29007
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      29.2138
_cell_measurement_theta_min      2.8123
_cell_volume                     6400.1(2)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      110(2)
_diffrn_detector_area_resol_mean 16.0690
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, Sapphire3, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0294
_diffrn_reflns_av_sigmaI/netI    0.0563
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       27
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            64094
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.96375
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       parallel
_exptl_crystal_F_000             2400
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_platon_squeeze_details
;
;
_refine_diff_density_max         0.482
_refine_diff_density_min         -0.520
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1481
_refine_ls_number_reflns         25131
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0776
_refine_ls_R_factor_gt           0.0527
_refine_ls_shift/su_max          0.023
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1075P)^2^+4.4207P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1781
_refine_ls_wR_factor_ref         0.1878
_reflns_number_gt                16804
_reflns_number_total             25131
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt12063a.txt
_cod_data_source_block           naome
_cod_database_code               7018512