Well-controlled ring-opening polymerization of cyclic esters initiated by dialkylaluminum β-diketiminates.
Li, Di; Peng, Ying; Geng, Chao; Liu, Kaipeng; Kong, Dexu; Dalton transactions (Cambridge, England : 2003) 42 (2013) 11295–11303; doi:10.1039/c3dt50372k

data_7022949
_publ_section_title
;
 Well-controlled ring-opening polymerization of cyclic esters initiated by
 dialkylaluminum \b-diketiminates.
;
_journal_issue                   31
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11295
_journal_page_last               11303
_journal_paper_doi               10.1039/c3dt50372k
_journal_volume                  42
_journal_year                    2013
_chemical_formula_sum            'C21 H43 Al N2'
_chemical_formula_weight         350.55
_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                 102.639(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.8557(5)
_cell_length_b                   25.6952(13)
_cell_length_c                   9.2957(4)
_cell_measurement_reflns_used    4192
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      22.583
_cell_measurement_theta_min      2.381
_cell_volume                     2297.04(19)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0297
_diffrn_reflns_av_unetI/netI     0.0299
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            14693
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.12
_exptl_absorpt_coefficient_mu    0.093
_exptl_absorpt_correction_T_max  0.9898
_exptl_absorpt_correction_T_min  0.9707
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'transparent white'
_exptl_crystal_density_diffrn    1.014
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.228
_refine_diff_density_min         -0.175
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    'riding mode'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         4031
_refine_ls_number_restraints     11
_refine_ls_restrained_S_all      1.082
_refine_ls_R_factor_all          0.0621
_refine_ls_R_factor_gt           0.0472
_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^)+(0.0793P)^2^+0.5982P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1348
_refine_ls_wR_factor_ref         0.1435
_reflns_number_gt                3143
_reflns_number_total             4031
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt50372k.txt
_cod_data_source_block           0
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7022949