A first structural and theoretical comparison of pyridinylidene-type rNHC (remote N-heterocyclic carbene) and NHC complexes of Ni(II) obtained by oxidative substitution.
Schneider, Sabine K.; Julius, Gerrit R.; Loschen, Christoph; Raubenheimer, Helgard G.; Frenking, Gernot; Herrmann, Wolfgang A.; Dalton transactions (Cambridge, England : 2003)  (2006) 1226–1233; doi:10.1039/b512419k

data_7006644
_publ_section_title
;
 A first structural and theoretical comparison of pyridinylidene-type
 rNHC (remote N-heterocyclic carbene) and NHC complexes of Ni(II)
 obtained by oxidative substitution.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1226
_journal_page_last               1233
_journal_paper_doi               10.1039/b512419k
_journal_year                    2006
_chemical_formula_moiety         'C42 H37 Cl N Ni P2, 1.5(C H2 Cl2), B F4'
_chemical_formula_sum            'C43.5 H40 B Cl4 F4 N Ni P2'
_chemical_formula_weight         926.03
_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                 92.392(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.7256(12)
_cell_length_b                   19.822(3)
_cell_length_c                   21.939(3)
_cell_measurement_reflns_used    1334
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      18.27
_cell_measurement_theta_min      2.25
_cell_volume                     4225.7(10)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'ORTEP3 for Windows (Farrugia, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX CCD area-detector'
_diffrn_measurement_method       \w
_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  0.0918
_diffrn_reflns_av_sigmaI/netI    0.1115
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            22008
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         1.39
_exptl_absorpt_coefficient_mu    0.839
_exptl_absorpt_correction_T_max  0.9208
_exptl_absorpt_correction_T_min  0.6469
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS, Blessing, Acta Cryst. A51 (1995) 33-38'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.456
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1900
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.800
_refine_diff_density_min         -0.667
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     524
_refine_ls_number_reflns         7474
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.1193
_refine_ls_R_factor_gt           0.0685
_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^)+(0.0605P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1339
_refine_ls_wR_factor_ref         0.1544
_reflns_number_gt                4667
_reflns_number_total             7474
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b512419k.txt
_cod_data_source_block           8
_cod_original_cell_volume        4225.9(9)
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_original_formula_sum        'C43.50 H40 B Cl4 F4 N Ni P2'
_cod_database_code               7006644