Synthesis of cyclic polylactide catalysed by bis(salicylaldiminato)tin(ii) complexes.
Piromjitpong, Parichat; Ratanapanee, Passachon; Thumrongpatanaraks, Wipavee; Kongsaeree, Palangpon; Phomphrai, Khamphee; Dalton transactions (Cambridge, England : 2003) 41 (2012) 12704–12710; doi:10.1039/c2dt31678a

data_7020485
_publ_section_title
;
 Synthesis of cyclic polylactide catalysed by
 bis(salicylaldiminato)tin(ii) complexes.
;
_journal_issue                   41
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12704
_journal_page_last               12710
_journal_paper_doi               10.1039/c2dt31678a
_journal_volume                  41
_journal_year                    2012
_chemical_absolute_configuration unk
_chemical_compound_source        Synthesis
_chemical_formula_moiety         'C38 H44 N2 O2 Sn'
_chemical_formula_sum            'C38 H44 N2 O2 Sn'
_chemical_formula_weight         679.472
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.977(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.8207(4)
_cell_length_b                   17.2625(5)
_cell_length_c                   23.1793(10)
_cell_measurement_reflns_used    3353
_cell_measurement_temperature    150
_cell_measurement_theta_max      28.700
_cell_measurement_theta_min      0.998
_cell_volume                     3528.9(2)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       KappaCCD
_computing_data_reduction
'Denzo and Scalepak (Otwinowski & Minor, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
'SIR97(Cascarano al.,Acta Cryst.,1996,A52,C-79)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.960
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device       KappaCCD
_diffrn_measurement_method       CCD
_diffrn_orient_matrix_type       X=UH
_diffrn_orient_matrix_UB_11      0.02415
_diffrn_orient_matrix_UB_12      0.11054
_diffrn_orient_matrix_UB_13      0.00732
_diffrn_orient_matrix_UB_21      0.00195
_diffrn_orient_matrix_UB_22      0.00340
_diffrn_orient_matrix_UB_23      -0.05780
_diffrn_orient_matrix_UB_31      -0.04197
_diffrn_orient_matrix_UB_32      0.00998
_diffrn_orient_matrix_UB_33      -0.00083
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           ' MoK\a'
_diffrn_radiation_wavelength_id  all
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            7069
_diffrn_reflns_theta_full        28.71
_diffrn_reflns_theta_max         28.71
_diffrn_reflns_theta_min         1.76
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.757
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.279
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1408
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.600
_refine_diff_density_min         -0.528
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         4373
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0610
_refine_ls_R_factor_gt           0.0405
_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^)+(0.0313P)^2^+5.5585P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0842
_refine_ls_wR_factor_ref         0.0953
_reflns_number_gt                3455
_reflns_number_total             4373
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt31678a.txt
_cod_data_source_block           compound
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7020485