Studies on Multinuclear Magnesium tert-Butyl Heteroscorpionates: Synthesis, Coordination Ability, and Heteroselective Ring-Opening Polymerization of rac-Lactide
Garcés, Andrés; Sánchez-Barba, Luis F.; Fernández-Baeza, Juan; Otero, Antonio; Lara-Sánchez, Agustín; Rodríguez, Ana M.; Organometallics 36 (2017) 884–; doi:10.1021/acs.organomet.6b00934

data_4087010
_publ_section_title
;
 Studies on Multinuclear Magnesium tert-Butyl Heteroscorpionates:
 Synthesis, Coordination Ability, and Heteroselective Ring-Opening
 Polymerization of rac-Lactide
;
_journal_issue                   4
_journal_name_full               Organometallics
_journal_page_first              884
_journal_paper_doi               10.1021/acs.organomet.6b00934
_journal_volume                  36
_journal_year                    2017
_chemical_formula_moiety         'C30 H37 Li N6 O, 0.5(C4 H8 O)'
_chemical_formula_sum            'C32 H41 Li N6 O1.5'
_chemical_formula_weight         540.65
_chemical_name_systematic
;
 ?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 117.559(2)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   29.4357(10)
_cell_length_b                   17.3456(5)
_cell_length_c                   14.5806(4)
_cell_measurement_reflns_used    5134
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      22.926
_cell_measurement_theta_min      2.368
_cell_volume                     6599.9(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX'
_computing_data_reduction        'Bruker SAINT, SADABS, XPREP'
_computing_molecular_graphics    'WINGX v2014.1 (Farrugia, 2012)'
_computing_publication_material  'WINGX v2014.1 (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXS-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'X8 APEXII'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0688
_diffrn_reflns_av_unetI/netI     0.0687
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            33496
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.341
_diffrn_reflns_theta_min         2.348
_exptl_absorpt_coefficient_mu    0.068
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6169
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.088
_exptl_crystal_description       prism
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.360
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.180
_refine_diff_density_max         0.585
_refine_diff_density_min         -0.316
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     432
_refine_ls_number_reflns         6005
_refine_ls_number_restraints     165
_refine_ls_restrained_S_all      1.016
_refine_ls_R_factor_all          0.1242
_refine_ls_R_factor_gt           0.0641
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1256P)^2^+1.7308P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1788
_refine_ls_wR_factor_ref         0.2144
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3373
_reflns_number_total             6005
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            om6b00934_si_002.cif
_cod_data_source_block           4
_cod_depositor_comments
'Adding full bibliography for 4087009--4087016.cif.'
_cod_original_formula_sum        'C32 H41 Li N6 O1.50'
_cod_database_code               4087010
_shelx_estimated_absorpt_t_min   0.976
_shelx_estimated_absorpt_t_max   0.988
_shelxl_version_number           2013-4
_shelx_res_checksum              83050
_shelx_hkl_checksum              34980
_shelx_fab_checksum              896