Four- and five-coordinate aluminum complexes supported by N,O-bidentate β-pyrazylenolate ligands: synthesis, structure and application in ROP of ε-caprolactone and lactide.
Qin, Lu; Zhang, Yue; Chao, Jianbin; Cheng, Jianhua; Chen, Xia; Dalton transactions (Cambridge, England : 2003) 48 (2019) 12315–12325; doi:10.1039/c9dt02330e

data_7700569
_publ_section_title
;
 Four- and five-coordinate aluminum complexes supported by N,O-bidentate
 \b-pyrazylenolate ligands: synthesis, structure and application in ROP of
 \e-caprolactone and lactide.
;
_journal_issue                   32
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12315
_journal_page_last               12325
_journal_paper_doi               10.1039/c9dt02330e
_journal_volume                  48
_journal_year                    2019
_chemical_formula_sum            'C16 H19 Al N2 O'
_chemical_formula_weight         282.31
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2016/6
_audit_update_record
;
2018-09-26 deposited with the CCDC.    2019-07-15 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.2000(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.2328(3)
_cell_length_b                   21.7930(10)
_cell_length_c                   9.9600(5)
_cell_measurement_reflns_used    8119
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      28.2845
_cell_measurement_theta_min      2.833
_cell_volume                     1507.60(12)
_computing_structure_refinement  'SHELXL-2016/6 (Sheldrick, 2016)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  CCD
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0296
_diffrn_reflns_av_unetI/netI     0.0262
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            14293
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.299
_diffrn_reflns_theta_min         2.834
_exptl_absorpt_coefficient_mu    0.132
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_description       block
_exptl_crystal_F_000             600
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.051
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     185
_refine_ls_number_reflns         3727
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0522
_refine_ls_R_factor_gt           0.0420
_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^)+(0.0688P)^2^+0.4583P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1172
_refine_ls_wR_factor_ref         0.1253
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3142
_reflns_number_total             3727
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt02330e2.cif
_cod_data_source_block           1_CCDC1
_cod_depositor_comments
'Adding full bibliography for 7700568--7700573.cif.'
_cod_database_code               7700569
_shelx_shelxl_version_number     2016/6
_shelx_res_checksum              22795