Substituent Effects of Pyridine-amine Nickel Catalyst Precursors on Ethylene Polymerization
Zai, Shaobo; Gao, Haiyang; Huang, Zengfang; Hu, Haibin; Wu, Han; Wu, Qing; ACS Catalysis 2 (2012) 433–; doi:10.1021/cs200593c

data_4505631
_publ_section_title
;
 Substituent Effects of Pyridine-amine Nickel Catalyst Precursors on
 Ethylene Polymerization
;
_journal_issue                   3
_journal_name_full               'ACS Catalysis'
_journal_page_first              433
_journal_paper_doi               10.1021/cs200593c
_journal_volume                  2
_journal_year                    2012
_chemical_formula_sum            'C48 H56 Br4 N4 Ni2'
_chemical_formula_weight         1126.03
_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                 110.777(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   14.0495(19)
_cell_length_b                   9.9391(14)
_cell_length_c                   17.681(2)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      18
_cell_measurement_theta_min      12
_cell_volume                     2308.4(5)
_computing_cell_refinement       'Nonius CAD4 software'
_computing_data_collection       'Nonius CAD4 software'
_computing_data_reduction        'XCAD (P.McArdle, 2000)'
_computing_molecular_graphics    'ORTEX (P.McArdle, 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick,1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  '4-circle diffractometer'
_diffrn_measurement_method       'scintillation counter'
_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  0.0322
_diffrn_reflns_av_sigmaI/netI    0.0431
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            12518
_diffrn_reflns_theta_full        27.09
_diffrn_reflns_theta_max         27.09
_diffrn_reflns_theta_min         1.60
_exptl_absorpt_coefficient_mu    4.315
_exptl_absorpt_correction_T_max  0.422
_exptl_absorpt_correction_T_min  0.137
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.620
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1136
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.510
_refine_diff_density_min         -0.524
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     267
_refine_ls_number_reflns         5015
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0289
_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^)+(0.0319P)^2^+0.0363P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0634
_refine_ls_wR_factor_ref         0.0713
_reflns_number_gt                3806
_reflns_number_total             5015
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cs200593c_si_002.cif
_cod_data_source_block           1
_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.

'_exptl_absorpt_correction_type' value 'Multi-Scan'
changed to 'multi-scan' 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 
;
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               4505631