Synthesis, Electronic Structure, and Magnetism of [Ni(6-Mes)2]+: A Two-Coordinate Nickel(I) Complex Stabilized by Bulky N-Heterocyclic Carbenes
Rebecca C. Poulten; Michael J. Page; Andrés G. Algarra; Jennifer J. Le Roy; Isidoro López; Emma Carter; Antoni Llobet; Stuart A. Macgregor; Mary F. Mahon; Damien M. Murphy; Muralee Murugesu; Michael K. Whittlesey; Journal of the American Chemical Society 135 (2013) 13640–13643; doi:10.1021/ja407004y

data_4120805
_publ_section_title
;
 Synthesis, Electronic Structure, and Magnetism of [Ni(6-Mes)2]+: A
 Two-Coordinate Nickel(I) Complex Stabilized by Bulky N-Heterocyclic
 Carbenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13640
_journal_page_last               13643
_journal_paper_doi               10.1021/ja407004y
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C46 H60 Br Cl4 N4 Ni'
_chemical_formula_weight         949.40
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 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                 94.612(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.3210(1)
_cell_length_b                   21.8360(3)
_cell_length_c                   10.4070(2)
_cell_measurement_reflns_used    86898
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.910
_cell_volume                     2337.82(6)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV 1997-2004)'
_computing_data_reduction        'Denzo & Scalepack (Otwinowski, Minor 1997)'
_computing_molecular_graphics    'ORTEX (P.McArdle 1995)'
_computing_publication_material  'SHELXL-97/2 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97/2 (Sheldrick 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  '95mm CCD camera on \k-goniostat'
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0492
_diffrn_reflns_av_sigmaI/netI    0.0436
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            46015
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.73
_exptl_absorpt_coefficient_mu    1.534
_exptl_absorpt_correction_T_max  0.502
_exptl_absorpt_correction_T_min  0.455
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements 
 Sortav (Blessing 1995)
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.349
_exptl_crystal_description       block
_exptl_crystal_F_000             990
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.394
_refine_diff_density_min         -0.656
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.002(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     530
_refine_ls_number_reflns         10667
_refine_ls_number_restraints     13
_refine_ls_restrained_S_all      1.044
_refine_ls_R_factor_all          0.0567
_refine_ls_R_factor_gt           0.0365
_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^)+(0.0476P)^2^+0.6038P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0842
_refine_ls_wR_factor_ref         0.0935
_reflns_number_gt                8383
_reflns_number_total             10667
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja407004y_si_001_1.cif
_cod_data_source_block           k10mkw10
_cod_database_code               4120805