Pyridine-amido aluminum catalyst precursors for 1,3-butadiene transition-metal-free stereospecific polymerization
Tang, Jian; Xu, Zijian; Liu, Zelong; Fu, Yuan; Hua, Jing; Polymer Chemistry 14 (2023) 980–989; doi:10.1039/D2PY01093C

data_1568469
_publ_section_title
;
 Pyridine-amido aluminum catalyst precursors for 1,3-butadiene
 transition-metal-free stereospecific polymerization
;
_journal_issue                   8
_journal_name_full               'Polymer Chemistry'
_journal_page_first              980
_journal_page_last               989
_journal_paper_doi               10.1039/D2PY01093C
_journal_volume                  14
_journal_year                    2023
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C18 H25 Al N2'
_chemical_formula_sum            'C18 H25 Al N2'
_chemical_formula_weight         296.38
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2022-03-31
_audit_creation_method
;
Olex2 1.5
(compiled 2021.12.09 svn.r5202d8cf for OlexSys, GUI svn.r6439)
;
_audit_update_record
;
2022-05-26 deposited with the CCDC.	2023-01-19 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.8305(14)
_cell_length_b                   12.0231(19)
_cell_length_c                   16.870(3)
_cell_measurement_reflns_used    1861
_cell_measurement_temperature    298.15
_cell_measurement_theta_max      17.909
_cell_measurement_theta_min      2.414
_cell_volume                     1791.1(5)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_collection       'Bruker SMART APEX II diffractrometer'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      298.15
_diffrn_detector                 'CCD area detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1136
_diffrn_reflns_av_unetI/netI     0.1118
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.986
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            20576
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.969
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.530
_diffrn_reflns_theta_min         2.080
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           30.0
_diffrn_source_power             1.5
_diffrn_source_target            Mo
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.110
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5033
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1126 before and 0.0678 after correction. The Ratio of minimum to maximum transmission is 0.6750. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            'clear light yellow'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.099
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.136
_refine_diff_density_min         -0.146
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details
;
 Flack x determined using 549 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.4(2)
_refine_ls_extinction_coef       0.0078(14)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         4005
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.1579
_refine_ls_R_factor_gt           0.0567
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0409P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1001
_refine_ls_wR_factor_ref         0.1251
_reflns_Friedel_coverage         0.724
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.948
_reflns_number_gt                1883
_reflns_number_total             4005
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2py01093c2.cif
_cod_data_source_block           211124c
_cod_depositor_comments
'Adding full bibliography for 1568468--1568473.cif.'
_cod_database_code               1568469
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.989
_shelx_estimated_absorpt_t_min   0.976
_exptl_crystal_mounting_method
'The title complex was mounted in a sealed capillary.'
_olex2_refinement_description
;
1.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C11(H11), C12(H12), C13(H13)
1.b Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C8(H8A,H8B,H8C), C15(H15A,H15B,H15C), C16(H16A,H16B,H16C),
 C17(H17A,H17B,H17C), C18(H18A,H18B,H18C)
;
_shelx_res_checksum              99972
_olex2_submission_special_instructions 'No special instructions were received'