Magnesium and Calcium Complexes Containing Biphenyl-Based Tridentate Iminophenolate Ligands for Ring-Opening Polymerization of rac-Lactide
Wei Yi; Haiyan Ma; Inorganic Chemistry 52 (2013) 11821–11835; doi:10.1021/ic4012668

data_4336421
_publ_contact_author_address
;
        Laboratory of Organometallic Chemistry
        East China University of Science and Technology
        130 Meilong Road, P.O.Box 310#
        200237,Shanghai
        P. R. China
;
_publ_contact_author_email       haiyanma@ecust.edu.cn
_publ_contact_author_fax         '0086 21 64253519'
_publ_contact_author_name        'Haiyan Ma'
_publ_contact_author_phone       '0086 21 64253519'
_publ_section_title
;
 Magnesium and Calcium Complexes Containing Biphenyl-Based Tridentate
 Iminophenolate Ligands for Ring-Opening Polymerization of rac-Lactide
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              11821
_journal_page_last               11835
_journal_paper_doi               10.1021/ic4012668
_journal_volume                  52
_journal_year                    2013
_chemical_formula_sum            'C60 H82 Br2 Mg2 N4 O4 Si4'
_chemical_formula_weight         1244.10
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 101.930(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.023(2)
_cell_length_b                   13.7491(18)
_cell_length_c                   29.338(4)
_cell_measurement_reflns_used    3028
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      47.685
_cell_measurement_theta_min      4.466
_cell_volume                     6718.3(15)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0977
_diffrn_reflns_av_sigmaI/netI    0.1487
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            33690
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    1.341
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.4503
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.230
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             2608
_exptl_crystal_size_max          0.269
_exptl_crystal_size_mid          0.215
_exptl_crystal_size_min          0.127
_refine_diff_density_max         0.503
_refine_diff_density_min         -0.617
_refine_diff_density_rms         0.074
_refine_ls_extinction_coef       0.0012(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.965
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     865
_refine_ls_number_reflns         12517
_refine_ls_number_restraints     199
_refine_ls_restrained_S_all      0.967
_refine_ls_R_factor_all          0.1767
_refine_ls_R_factor_gt           0.0611
_refine_ls_shift/su_max          0.036
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0781P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1389
_refine_ls_wR_factor_ref         0.1913
_reflns_number_gt                5032
_reflns_number_total             12517
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic4012668_si_002_6.cif
_cod_data_source_block           cd211315
_cod_original_cell_volume        6718.2(15)
_cod_database_code               4336421