Synthesis, structures of (aminopyridine)nickel complexes and their use for catalytic ethylene polymerization.
Lin, Ya-Chi; Yu, Kuo-Hsuan; Lin, Ya-Fan; Lee, Gene-Hsiang; Wang, Yu; Liu, Shiuh-Tzung; Chen, Jwu-Ting; Dalton transactions (Cambridge, England : 2003) 41 (2012) 6661–6670; doi:10.1039/c2dt30151b

data_7019125
_publ_section_title
;
 Synthesis, structures of (aminopyridine)nickel complexes and their use
 for catalytic ethylene polymerization.
;
_journal_issue                   22
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6661
_journal_page_last               6670
_journal_paper_doi               10.1039/c2dt30151b
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C20 H32 Br4 N4 Ni2'
_chemical_formula_weight         765.56
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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                76.293(1)
_cell_angle_beta                 89.199(1)
_cell_angle_gamma                71.404(1)
_cell_formula_units_Z            1
_cell_length_a                   8.0121(3)
_cell_length_b                   8.6141(3)
_cell_length_c                   10.4721(4)
_cell_measurement_reflns_used    4488
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.01
_cell_volume                     664.02(4)
_computing_cell_refinement       'Bruker SAINT'
_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      295(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART 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  0.0204
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            9354
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.01
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    7.450
_exptl_absorpt_correction_T_max  0.4915
_exptl_absorpt_correction_T_min  0.3627
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.914
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             376
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.816
_refine_diff_density_min         -0.638
_refine_diff_density_rms         0.063
_refine_ls_extinction_coef       0.0045(5)
_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   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     141
_refine_ls_number_reflns         3058
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0338
_refine_ls_R_factor_gt           0.0225
_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^)+(0.0259P)^2^+0.0724P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0508
_refine_ls_wR_factor_ref         0.0529
_reflns_number_gt                2412
_reflns_number_total             3058
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2dt30151b.txt
_cod_data_source_block           ic8329
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'not_measured' 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_sg_symbol_H-M      P-1
_cod_database_code               7019125