Ring-Opening Polymerization of Cyclic Esters and Trimethylene Carbonate Catalyzed by Aluminum Half-Salen Complexes
Donald J. Darensbourg; Osit Karroonnirun; Stephanie J. Wilson; Inorganic Chemistry 50 (2011) 6775–6787; doi:10.1021/ic2008057

data_4325695
_publ_section_title
;
 Ring-Opening Polymerization of Cyclic Esters and Trimethylene Carbonate
 Catalyzed by Aluminum Half-Salen Complexes
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6775
_journal_page_last               6787
_journal_paper_doi               10.1021/ic2008057
_journal_volume                  50
_journal_year                    2011
_chemical_formula_sum            'C150 H145 Al4 B2 Cl18 F48 N4 O18'
_chemical_formula_weight         3971.34
_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                 102.383(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   29.458(2)
_cell_length_b                   20.3463(15)
_cell_length_c                   30.256(2)
_cell_measurement_reflns_used    8736
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      60.59
_cell_measurement_theta_min      2.66
_cell_volume                     17712(2)
_computing_cell_refinement       'GADDS (BRUKER-NONIUS, 2008)'
_computing_data_collection       'GADDS (BRUKER-NONIUS, 2008)'
_computing_data_reduction        'GADDS (BRUKER-NONIUS, 2008)'
_computing_molecular_graphics    'SHELXS-97 (Sheldrick, 2008)'
_computing_publication_material  'SHELXS-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXS-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.969
_diffrn_measured_fraction_theta_max 0.969
_diffrn_measurement_device_type  Gadds
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0959
_diffrn_reflns_av_sigmaI/netI    0.0744
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            129138
_diffrn_reflns_theta_full        60.90
_diffrn_reflns_theta_max         60.90
_diffrn_reflns_theta_min         2.64
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.725
_exptl_absorpt_correction_T_max  0.7071
_exptl_absorpt_correction_T_min  0.6635
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; (Sheldrick, 2006)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.489
_exptl_crystal_description       block
_exptl_crystal_F_000             8068
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.367
_refine_diff_density_min         -1.045
_refine_diff_density_rms         0.158
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   3.754
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     2194
_refine_ls_number_reflns         26167
_refine_ls_number_restraints     1005
_refine_ls_restrained_S_all      3.913
_refine_ls_R_factor_all          0.2258
_refine_ls_R_factor_gt           0.1655
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0300P)^2^+2.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3270
_refine_ls_wR_factor_ref         0.3404
_reflns_number_gt                16581
_reflns_number_total             26167
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic2008057_si_002_8.cif
_cod_data_source_block           allactide
_cod_database_code               4325695