Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline ligands: synthesis, molecular structure, and catalytic performance in ethylene copolymerization.
Nifant'ev, Ilya E.; Ivchenko, Pavel V.; Bagrov, Vladimir V.; Nagy, Sandor M.; Winslow, Linda N.; Merrick-Mack, Jean A; Mihan, Shahram; Churakov, Andrei V.; Dalton transactions (Cambridge, England : 2003) 42 (2013) 1501–1511; doi:10.1039/c2dt31856c

data_7022153
_publ_section_title
;
 Zirconium and hafnium complexes based on 2-aryl-8-arylaminoquinoline
 ligands: synthesis, molecular structure, and catalytic performance in
 ethylene copolymerization.
;
_journal_issue                   5
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1501
_journal_page_last               1511
_journal_paper_doi               10.1039/c2dt31856c
_journal_volume                  42
_journal_year                    2013
_chemical_formula_moiety         'C45 H42 Hf N2, C6 H6'
_chemical_formula_sum            'C51 H48 Hf N2'
_chemical_formula_weight         867.40
_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                 99.135(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.693(4)
_cell_length_b                   16.488(5)
_cell_length_c                   17.561(6)
_cell_measurement_reflns_used    1975
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.964
_cell_measurement_theta_min      2.399
_cell_volume                     3914(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX II'
_diffrn_measurement_method       \w
_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  0.1383
_diffrn_reflns_av_sigmaI/netI    0.1253
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            28148
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         1.70
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.703
_exptl_absorpt_correction_T_max  0.9866
_exptl_absorpt_correction_T_min  0.6872
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2004)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.472
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1760
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.01
_refine_diff_density_max         1.240
_refine_diff_density_min         -1.108
_refine_diff_density_rms         0.163
_refine_ls_extinction_coef       0.00070(10)
_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   0.923
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     492
_refine_ls_number_reflns         7050
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.923
_refine_ls_R_factor_all          0.0977
_refine_ls_R_factor_gt           0.0510
_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^)+(0.0254P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0933
_refine_ls_wR_factor_ref         0.1033
_reflns_number_gt                4539
_reflns_number_total             7050
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c2dt31856c.txt
_cod_data_source_block           b
_cod_original_cell_volume        3915(2)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7022153