Longstanding living polymerization of ethylene: substituent effect on bridging carbon of 2-pyridinemethanamine nickel catalysts
Zai, Shaobo; Liu, Fengshou; Gao, Haiyang; Li, Cong; Zhou, Guiyu; Cheng, Shan; Guo, Lihua; Zhang, Ling; Zhu, Fangming; Wu, Qing; Chemical Communications 46 (2010) 4321–4323; doi:10.1039/c000176g

data_7111587
_publ_section_title
;
 Longstanding living polymerization of ethylene: substituent effect on
 bridging carbon of 2-pyridinemethanamine nickel catalysts
;
_journal_issue                   24
_journal_name_full               'Chemical Communications'
_journal_page_first              4321
_journal_page_last               4323
_journal_paper_doi               10.1039/c000176g
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C39 H54 Br4 Cl2 N4 Ni2'
_chemical_formula_weight         1086.82
_chemical_name_systematic
;
?
;
_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                 92.154(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.4583(17)
_cell_length_b                   15.3616(14)
_cell_length_c                   15.5084(14)
_cell_measurement_reflns_used    8531
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.9789
_cell_measurement_theta_min      2.1938
_cell_volume                     4394.3(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SMART'
_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      173(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0443
_diffrn_reflns_av_sigmaI/netI    0.0555
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            29190
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.73
_exptl_absorpt_coefficient_mu    4.648
_exptl_absorpt_correction_T_max  0.3953
_exptl_absorpt_correction_T_min  0.1128
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2004)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.643
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2184
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.931
_refine_diff_density_min         -0.901
_refine_diff_density_rms         0.118
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    geom
_refine_ls_matrix_type           full
_refine_ls_number_parameters     478
_refine_ls_number_reflns         9553
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0688
_refine_ls_R_factor_gt           0.0344
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0400P)^2^+3.8753P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0769
_refine_ls_wR_factor_ref         0.0921
_reflns_number_gt                6612
_reflns_number_total             9553
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c000176gsup1.cif
_cod_data_source_block           1
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7111587