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_7006643
_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, 2(C H2 Cl2), B F4'
_chemical_formula_sum            'C44 H41 B Cl5 F4 N Ni P2'
_chemical_formula_weight         968.49
_chemical_name_systematic
;
?
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   18.114(4)
_cell_length_b                   21.802(5)
_cell_length_c                   11.028(2)
_cell_measurement_reflns_used    3812
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.88
_cell_measurement_theta_min      2.16
_cell_volume                     4355.2(16)
_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 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0558
_diffrn_reflns_av_sigmaI/netI    0.0411
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            22684
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         1.87
_exptl_absorpt_coefficient_mu    0.877
_exptl_absorpt_correction_T_max  0.9175
_exptl_absorpt_correction_T_min  0.7602
_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    1.477
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1984
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.838
_refine_diff_density_min         -1.222
_refine_diff_density_rms         0.094
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     281
_refine_ls_number_reflns         4250
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0740
_refine_ls_R_factor_gt           0.0537
_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^)+(0.0627P)^2^+12.6339P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1271
_refine_ls_wR_factor_ref         0.1399
_reflns_number_gt                3305
_reflns_number_total             4250
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b512419k.txt
_cod_data_source_block           7
_cod_original_cell_volume        4355.4(16)
_cod_original_sg_symbol_H-M      Pnma
_cod_database_code               7006643