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_7702048
_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 rmad
_chemical_formula_moiety         'C38 H44 N2 O2'
_chemical_formula_sum            'C38 H44 N2 O2'
_chemical_formula_weight         560.75
_space_group_crystal_system      orthorhombic
_space_group_IT_number           41
_space_group_name_Hall           'A 2 -2ab'
_space_group_name_H-M_alt        'A e a 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2014-09-01
_audit_creation_method
;
Olex2 1.2
(compiled 2014.07.22 svn.r2960 for OlexSys, GUI svn.r4862)
;
_audit_update_record
;
2015-05-05 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                   9.9750(19)
_cell_length_b                   30.060(7)
_cell_length_c                   10.719(2)
_cell_measurement_reflns_used    2613
_cell_measurement_temperature    130
_cell_measurement_theta_max      26.29
_cell_measurement_theta_min      2.87
_cell_volume                     3214.1(11)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      130
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0764
_diffrn_reflns_av_unetI/netI     0.0744
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       43
_diffrn_reflns_limit_k_min       -43
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            15858
_diffrn_reflns_point_group_measured_fraction_full 0.897
_diffrn_reflns_point_group_measured_fraction_max 0.847
_diffrn_reflns_theta_full        26.000
_diffrn_reflns_theta_max         30.947
_diffrn_reflns_theta_min         1.355
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.5575
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0878 before and 0.0691 after correction.
The Ratio of minimum to maximum transmission is 0.7472.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.159
_exptl_crystal_description       plate
_exptl_crystal_F_000             1208
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.271
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details
;
 Flack x determined using 1095 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.5(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         4310
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0706
_refine_ls_R_factor_gt           0.0521
_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^)+(0.0676P)^2^+0.1481P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1235
_refine_ls_wR_factor_ref         0.1350
_reflns_Friedel_coverage         0.620
_reflns_Friedel_fraction_full    0.782
_reflns_Friedel_fraction_max     0.683
_reflns_number_gt                3392
_reflns_number_total             4310
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c5dt04633e2.cif
_cod_data_source_block           dm14499
_cod_original_cell_volume        3214.0(11)
_cod_original_sg_symbol_Hall     'A 2 -2ac'
_cod_database_code               7702048
_shelxl_version_number           2014-3
_shelx_estimated_absorpt_t_max   0.998
_shelx_estimated_absorpt_t_min   0.978
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C8(H8), C10(H10), C12(H12)
2.b Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,
 H18C), C19(H19A,H19B,H19C)
2.c Idealised tetrahedral OH refined as rotating group:
 O1(H1)
;
_shelx_res_checksum              47256
_olex2_submission_special_instructions 'No special instructions were received'