Aluminum methyl, alkoxide and α-alkoxy ester complexes supported by 6,6'-dimethylbiphenyl-bridged salen ligands: synthesis, characterization and catalysis for rac-lactide polymerization.
Kan, Chao; Ge, Jilei; Ma, Haiyan; Dalton transactions (Cambridge, England : 2003) 45 (2016) 6682–6695; doi:10.1039/c5dt04633e

data_7702047
_publ_section_title
;
 Aluminum methyl, alkoxide and \a-alkoxy ester complexes supported by
 6,6'-dimethylbiphenyl-bridged salen ligands: synthesis, characterization
 and catalysis for rac-lactide polymerization.
;
_journal_issue                   15
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6682
_journal_page_last               6695
_journal_paper_doi               10.1039/c5dt04633e
_journal_volume                  45
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_sum            'C45 H49 Al N2 O3'
_chemical_formula_weight         692.84
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014
_audit_update_record
;
2014-07-17 deposited with the CCDC.
2016-03-01 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.2232(13)
_cell_length_b                   15.5668(16)
_cell_length_c                   20.211(2)
_cell_measurement_reflns_used    2654
_cell_measurement_temperature    140(2)
_cell_measurement_theta_max      21.42
_cell_measurement_theta_min      2.35
_cell_volume                     3845.7(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      140(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0981
_diffrn_reflns_av_unetI/netI     0.1170
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            39163
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.530
_diffrn_reflns_theta_min         1.651
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6827
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_description       block
_exptl_crystal_F_000             1480
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.160
_exptl_crystal_size_min          0.080
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.316
_refine_diff_density_rms         0.058
_refine_ls_abs_structure_details
; 
 Flack x determined using 2285 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.11(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.993
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     470
_refine_ls_number_reflns         11764
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.993
_refine_ls_R_factor_all          0.1248
_refine_ls_R_factor_gt           0.0614
_refine_ls_shift/su_max          0.038
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0489P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1092
_refine_ls_wR_factor_ref         0.1319
_reflns_Friedel_coverage         0.818
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                7077
_reflns_number_total             11764
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5dt04633e2.cif
_cod_data_source_block           mo_dm14266_0m
_cod_original_cell_volume        3845.6(7)
_cod_database_code               7702047
_shelx_estimated_absorpt_t_min   0.981
_shelx_estimated_absorpt_t_max   0.992
_shelxl_version_number           2014-3
_shelx_res_checksum              79583