Synthesis of N,N,O-chelate zinc and aluminum complexes and their catalysis in the ring-opening polymerization of ε-caprolactone and rac-lactide.
Kong, Wei-Li; Chai, Zuo-Yun; Wang, Zhong-Xia; Dalton transactions (Cambridge, England : 2003) 43 (2014) 14470–14480; doi:10.1039/c4dt01364f

data_7031520
_publ_section_title
;
 Synthesis of N,N,O-chelate zinc and aluminum complexes and their
 catalysis in the ring-opening polymerization of \e-caprolactone and
 rac-lactide.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              14470
_journal_page_last               14480
_journal_paper_doi               10.1039/c4dt01364f
_journal_volume                  43
_journal_year                    2014
_chemical_formula_sum            'C26 H28 Al N3 O'
_chemical_formula_weight         425.49
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           144
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 31'
_symmetry_space_group_name_H-M   'P 31'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            3
_cell_length_a                   8.9081(6)
_cell_length_b                   8.9081(6)
_cell_length_c                   26.125(2)
_cell_measurement_reflns_used    1034
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      17.971
_cell_measurement_theta_min      2.634
_cell_volume                     1795.4(2)
_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      298(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0653
_diffrn_reflns_av_sigmaI/netI    0.1773
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            10873
_diffrn_reflns_theta_full        28.38
_diffrn_reflns_theta_max         28.38
_diffrn_reflns_theta_min         2.64
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.9873
_exptl_absorpt_correction_T_min  0.9780
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.181
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             678
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.101
_refine_diff_density_rms         0.026
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.03(16)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.711
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         5681
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.711
_refine_ls_R_factor_all          0.1798
_refine_ls_R_factor_gt           0.0429
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0489
_refine_ls_wR_factor_ref         0.0663
_reflns_number_gt                1863
_reflns_number_total             5681
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt01364f2.cif
_cod_data_source_block           101102j
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

 Adding full bibliography for 7031517--7031520.cif.
;
_cod_original_sg_symbol_H-M      P3(1)
_cod_database_code               7031520