Efficient Route for Cyclic Olefin Polymerization: Nonchelated Monodentate Benzimidazole Nickel(II) Complex Catalysts for Vinyl Polymerization of Norbornene
Tarte, Naresh H.; Cho, Hyun Yong; Woo, Seong Ihl; Macromolecules 40 (2007) 8162–; doi:10.1021/ma071696k

data_1505164
_publ_section_title
;
 Efficient Route for Cyclic Olefin Polymerization:&#x00A0; Nonchelated
 Monodentate Benzimidazole Nickel(II) Complex Catalysts for Vinyl
 Polymerization of Norbornene
;
_journal_issue                   23
_journal_name_full               Macromolecules
_journal_page_first              8162
_journal_paper_doi               10.1021/ma071696k
_journal_volume                  40
_journal_year                    2007
_chemical_formula_sum            'C44 H40 Br2 N4 Ni O4'
_chemical_formula_weight         907.33
_chemical_melting_point          562
_chemical_name_common            Ni(II)_bis(methoxybenzylphenyl_benzimidazole)
_chemical_name_systematic
Bis[1-(2-methoxybenzyl)-2-(2-methoxyphenyl)-1H-benzimidazole]nickel(II)dibromide
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 102.302(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.270(3)
_cell_length_b                   12.986(2)
_cell_length_c                   21.712(3)
_cell_measurement_reflns_used    2834
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      19.67
_cell_measurement_theta_min      2.47
_cell_volume                     3931.1(12)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.956
_diffrn_measured_fraction_theta_max 0.956
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.1331
_diffrn_reflns_av_sigmaI/netI    0.1888
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            40560
_diffrn_reflns_theta_full        28.54
_diffrn_reflns_theta_max         28.54
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    2.575
_exptl_absorpt_correction_T_max  0.8608
_exptl_absorpt_correction_T_min  0.6834
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.533
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1848
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.759
_refine_diff_density_min         -1.030
_refine_diff_density_rms         0.135
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.983
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     310
_refine_ls_number_reflns         9560
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.983
_refine_ls_R_factor_all          0.1850
_refine_ls_R_factor_gt           0.0669
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0578P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1255
_refine_ls_wR_factor_ref         0.1607
_reflns_number_gt                4253
_reflns_number_total             9560
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ma071696k-file001.cif
_cod_data_source_block           added_by_encifer
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'none' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        3931.2(11)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1505164