New phenyl–nickel complexes of bulky 2-iminopyrrolyl chelates: synthesis, characterisation and application as aluminium-free catalysts for the production of hyperbranched polyethylene
Figueira, Cláudia A.; Lopes, Patrícia S.; Gomes, Clara S. B.; Gomes, Joselaine C. S.; Lemos, Francisco; Gomes, Pedro T.; Dalton Transactions  (2018) –; doi:10.1039/C8DT02824A

data_7047898
_publ_section_title
;
 New phenyl--nickel complexes of bulky 2-iminopyrrolyl chelates:
 synthesis, characterisation and application as aluminium-free catalysts
 for the production of hyperbranched polyethylene
;
_journal_name_full               'Dalton Transactions'
_journal_paper_doi               10.1039/C8DT02824A
_journal_year                    2018
_chemical_formula_moiety         '2(C23 H26 N2), H2 O'
_chemical_formula_sum            'C46 H54 N4 O'
_chemical_formula_weight         678.93
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/1
_audit_update_record
;
2018-09-05 deposited with the CCDC.
2018-09-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.5296(4)
_cell_length_b                   15.0823(5)
_cell_length_c                   19.7874(6)
_cell_measurement_reflns_used    9953
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      24.81
_cell_measurement_theta_min      2.70
_cell_volume                     4037.8(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP
_computing_publication_material  enCIFer
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_structure_solution    SIR2004
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0428
_diffrn_reflns_av_unetI/netI     0.0404
_diffrn_reflns_Laue_measured_fraction_full 0.995
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            39980
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.740
_diffrn_reflns_theta_min         1.698
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.067
_exptl_absorpt_correction_T_max  0.980
_exptl_absorpt_correction_T_min  0.974
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    1.117
_exptl_crystal_description       Block
_exptl_crystal_F_000             1464
_exptl_crystal_size_max          0.400
_exptl_crystal_size_mid          0.350
_exptl_crystal_size_min          0.300
_refine_diff_density_max         0.111
_refine_diff_density_min         -0.184
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details
;
 Flack x determined using 2458 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.015
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     484
_refine_ls_number_reflns         7652
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.0510
_refine_ls_R_factor_gt           0.0366
_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^)+(0.0470P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0770
_refine_ls_wR_factor_ref         0.0816
_reflns_Friedel_coverage         0.792
_reflns_Friedel_fraction_full    0.995
_reflns_Friedel_fraction_max     0.988
_reflns_number_gt                6370
_reflns_number_total             7652
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8dt02824a2.cif
_cod_data_source_block           IIA
_cod_database_code               7047898
_shelx_shelxl_version_number     2018/1
_shelx_estimated_absorpt_t_min   0.974
_shelx_estimated_absorpt_t_max   0.980
_shelx_res_checksum              99410