Synthesis and characterisation of alkylaluminium benzimidazolates and their use in the ring-opening polymerisation of ε-caprolactone.
Shen, Miao; Huang, Wei; Zhang, Wenjuan; Hao, Xiang; Sun, Wen-Hua; Redshaw, Carl; Dalton transactions (Cambridge, England : 2003) 39 (2010) 9912–9922; doi:10.1039/c0dt00514b

data_7026562
_publ_section_title
;
 Synthesis and characterisation of alkylaluminium benzimidazolates and
 their use in the ring-opening polymerisation of \e-caprolactone.
;
_journal_issue                   41
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9912
_journal_page_last               9922
_journal_paper_doi               10.1039/c0dt00514b
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C17 H20 Al N3'
_chemical_formula_weight         293.34
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.72(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2014(14)
_cell_length_b                   16.582(3)
_cell_length_c                   13.370(3)
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.54
_cell_measurement_theta_min      1.96
_cell_volume                     1593.2(6)
_computing_cell_refinement       'Siemens SMART & SAINT'
_computing_data_collection       'Siemens SMART'
_computing_data_reduction        'Siemens XPREP'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w 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  0.0378
_diffrn_reflns_av_sigmaI/netI    0.0313
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            12754
_diffrn_reflns_theta_full        27.54
_diffrn_reflns_theta_max         27.54
_diffrn_reflns_theta_min         1.96
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.124
_exptl_absorpt_correction_T_max  0.9731
_exptl_absorpt_correction_T_min  0.9519
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.223
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.625
_refine_diff_density_min         -0.341
_refine_diff_density_rms         0.117
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.165
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         3650
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.165
_refine_ls_R_factor_gt           0.0743
_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^)+(0.0947P)^2^+0.9431P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1954
_refine_ls_wR_factor_ref         0.1988
_reflns_number_gt                3462
_reflns_number_total             3650
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00514b.txt
_cod_data_source_block           2
_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_cell_volume        1593.3(5)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7026562
_refine_ls_r_factor_ref          0.0784