New weakly coordinating counter anions for high activity polymerisation catalysts: [(C6F5)3B–CN–B(C6F5)3]− and [Ni{CNB(C6F5)3}4]2−
Lancaster, Simon J.; Walker, Dennis A.; Thornton-Pett, Mark; Bochmann, Manfred; Chemical Communications  (1999) 1533–; doi:10.1039/a903788h

data_7110591
_publ_section_title
;
 New weakly coordinating counter anions for high activity polymerisation
 catalysts: [(C6F5)3B--CN--B(C6F5)3]&#x2212; and
 [Ni{CNB(C6F5)3}4]2&#x2212;
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_journal_issue                   16
_journal_name_full               'Chemical Communications'
_journal_page_first              1533
_journal_paper_doi               10.1039/a903788h
_journal_year                    1999
_chemical_formula_sum            'C56 H15 B2 F30 N'
_chemical_formula_weight         1293.31
_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                116.4370(6)
_cell_angle_beta                 90.9440(7)
_cell_angle_gamma                113.6410(5)
_cell_formula_units_Z            2
_cell_length_a                   13.3342(2)
_cell_length_b                   14.8405(2)
_cell_length_c                   15.8631(2)
_cell_measurement_reflns_used    56512
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.0
_cell_volume                     2501.10(6)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1996)'
_computing_molecular_graphics    'ORTEX (McArdle, 1995)'
_computing_publication_material  'local program'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius KappaCCD area detector diffractometer'
_diffrn_measurement_method
;
   Detector set at 30mm from sample with different 2theta offsets 
   1 degree phi exposures for chi=0 degree settings
   1 degree omega exposures for chi=90 degree settings
;
_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  0.0304
_diffrn_reflns_av_sigmaI/netI    0.0378
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            58348
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.79
_exptl_absorpt_coefficient_mu    0.178
_exptl_absorpt_correction_T_max  0.9686
_exptl_absorpt_correction_T_min  0.9005
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 Using multiple and symmetry-related data measurements via the program SORTAV
 See R.H. Blessing, Acta Cryst (1995), A51, 33-38 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.717
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1276
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.507
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.042
_refine_ls_extinction_coef       0.0048(11)
_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   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     803
_refine_ls_number_reflns         9800
_refine_ls_number_restraints     333
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0405
_refine_ls_R_factor_gt           0.0355
_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^)+(0.0394P)^2^+1.0052P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0928
_refine_ls_wR_factor_ref         0.0972
_reflns_number_gt                8664
_reflns_number_total             9800
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            903788hsup1.cif
_cod_data_source_block           mb56
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7110591