Synthesis and Characterization of Dialkylaluminum Amidates and Their Ring-Opening Polymerization of ε-Caprolactone
Zhang, Wenjuan; Wang, Youhong; Cao, Ji; Wang, Lin; Pan, Yi; Redshaw, Carl; Sun, Wen-Hua; Organometallics 30 (2011) 6253–; doi:10.1021/om2008343

data_4065479
_publ_section_title
;
 Synthesis and Characterization of Dialkylaluminum Amidates and Their
 Ring-Opening Polymerization of \e-Caprolactone
;
_journal_issue                   22
_journal_name_full               Organometallics
_journal_page_first              6253
_journal_paper_doi               10.1021/om2008343
_journal_volume                  30
_journal_year                    2011
_chemical_formula_sum            'C18 H18 Al N3 O'
_chemical_formula_weight         319.33
_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                 90.54(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.006(3)
_cell_length_b                   17.275(4)
_cell_length_c                   14.339(3)
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.57
_cell_volume                     3221.5(13)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2007)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2007)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0555
_diffrn_reflns_av_sigmaI/netI    0.0474
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            28296
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         1.57
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9419
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1344
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.360
_refine_diff_density_min         -0.395
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.235
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         7347
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.235
_refine_ls_R_factor_gt           0.0804
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0511P)^2^+3.2915P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1758
_refine_ls_wR_factor_ref         0.1801
_reflns_number_gt                6832
_reflns_number_total             7347
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om2008343_si_001.cif
_cod_data_source_block           C9
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3221.5(11)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4065479
_refine_ls_r_factor_ref          0.0873