Lactide polymerization catalyzed by Mg and Zn diketiminate complexes with flexible ligand frameworks.
Whitehorne, Todd J. J.; Vabre, Boris; Schaper, Frank; Dalton transactions (Cambridge, England : 2003) 43 (2014) 6339–6352; doi:10.1039/c3dt53278j

data_7030036
_publ_section_title
;
 Lactide polymerization catalyzed by Mg and Zn diketiminate complexes with
 flexible ligand frameworks.
;
_journal_issue                   17
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6339
_journal_page_last               6352
_journal_paper_doi               10.1039/c3dt53278j
_journal_volume                  43
_journal_year                    2014
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_moiety         'C31 H51 Mg N3 Si2'
_chemical_formula_sum            'C15.5 H25.5 Mg0.5 N1.5 Si'
_chemical_formula_weight         273.12
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           62
_space_group_name_Hall           '-P 2ac 2n'
_space_group_name_H-M_alt        'P n m a'
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   17.4882(2)
_cell_length_b                   18.0767(2)
_cell_length_c                   10.3297(1)
_cell_measurement_reflns_used    9747
_cell_measurement_temperature    100
_cell_measurement_theta_max      71.73
_cell_measurement_theta_min      4.89
_cell_volume                     3265.52(6)
_computing_cell_refinement       'SAINT V8.30C(Bruker AXS, )'
_computing_data_collection       'APEX2  (Bruker AXS, 0)'
_computing_data_reduction        'SAINT V8.30C(Bruker AXS, )'
_computing_molecular_graphics    'SHELXTL  (Bruker AXS, 2003)'
_computing_publication_material  'UdMX (Maris, 2004)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Bruker APEX II'
_diffrn_measurement_method       \w
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.025
_diffrn_reflns_av_unetI/netI     0.0105
_diffrn_reflns_Laue_measured_fraction_full 0.983
_diffrn_reflns_Laue_measured_fraction_max 0.977
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            45504
_diffrn_reflns_point_group_measured_fraction_full 0.983
_diffrn_reflns_point_group_measured_fraction_max 0.977
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         71.802
_diffrn_reflns_theta_min         4.893
_diffrn_source                   'Incoatec I\muS Microsource '
_exptl_absorpt_coefficient_mu    1.334
_exptl_absorpt_correction_T_max  0.7535
_exptl_absorpt_correction_T_min  0.6832
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick, 2012)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.111
_exptl_crystal_description       block
_exptl_crystal_F_000             1192
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.07
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     186
_refine_ls_number_reflns         3233
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0346
_refine_ls_R_factor_gt           0.0338
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)+(0.0595P)^2^+1.2831P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0952
_refine_ls_wR_factor_ref         0.0959
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3122
_reflns_number_total             3233
_cod_data_source_file            c3dt53278j2.cif
_cod_data_source_block           TODD39
_cod_original_sg_symbol_H-M      Pnma
_cod_original_formula_sum        'C15.50 H25.50 Mg0.50 N1.50 Si'
_cod_database_code               7030036