New tetradentate N,N,N,N-chelating α-diimine ligands and their corresponding zinc and nickel complexes: synthesis, characterisation and testing as olefin polymerisation catalysts.
Li, Lidong; Gomes, Clara S. B.; Gomes, Pedro T.; Duarte, M. Teresa; Fan, Zhiqiang; Dalton transactions (Cambridge, England : 2003) 40 (2011) 3365–3380; doi:10.1039/c0dt01308k

data_7015170
_publ_section_title
;
 New tetradentate N,N,N,N-chelating \a-diimine ligands and their
 corresponding zinc and nickel complexes: synthesis, characterisation
 and testing as olefin polymerisation catalysts.
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3365
_journal_page_last               3380
_journal_paper_doi               10.1039/c0dt01308k
_journal_volume                  40
_journal_year                    2011
_chemical_formula_moiety         'C42 H30 N8'
_chemical_formula_sum            'C42 H30 N8'
_chemical_formula_weight         646.74
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                79.809(18)
_cell_angle_beta                 82.010(17)
_cell_angle_gamma                83.249(19)
_cell_formula_units_Z            2
_cell_length_a                   9.264(3)
_cell_length_b                   11.425(3)
_cell_length_c                   16.053(5)
_cell_measurement_reflns_used    785
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      18.72
_cell_measurement_theta_min      2.23
_cell_volume                     1648.5(9)
_computing_cell_refinement       'Bruker SMART (Bruker, 1997)'
_computing_data_collection       'Bruker SMART (Bruker, 1997)'
_computing_data_reduction        'Bruker SAINT (Bruker, 1997)'
_computing_molecular_graphics    ORTEP
_computing_publication_material  enCIFer
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR2004 (Burla et al., 2005)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.1317
_diffrn_reflns_av_sigmaI/netI    0.1964
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            17711
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.60
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9968
_exptl_absorpt_correction_T_min  0.9795
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            orange-yellow
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             676
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.054
_refine_ls_extinction_coef       0.0073(8)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.832
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     452
_refine_ls_number_reflns         5814
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.832
_refine_ls_R_factor_all          0.2017
_refine_ls_R_factor_gt           0.0596
_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^)+(0.0395P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0997
_refine_ls_wR_factor_ref         0.1243
_reflns_number_gt                2349
_reflns_number_total             5814
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt01308k.txt
_cod_data_source_block           5a
_cod_original_cell_volume        1648.5(8)
_cod_database_code               7015170