Nickel(0) Complexes of N-Alkyl-Substituted N-Heterocyclic Carbenes and Their Use in the Catalytic Carbon−Carbon Bond Activation of Biphenylene
Schaub, Thomas; Backes, Marc; Radius, Udo; Organometallics 25 (2006) 4196–; doi:10.1021/om0604223

data_4074122
_publ_section_title
;
 Nickel(0) Complexes of N-Alkyl-Substituted N-Heterocyclic Carbenes and
 Their Use in the Catalytic Carbon&#x2212;Carbon Bond Activation of
 Biphenylene
;
_journal_issue                   17
_journal_name_full               Organometallics
_journal_page_first              4196
_journal_paper_doi               10.1021/om0604223
_journal_volume                  25
_journal_year                    2006
_chemical_formula_sum            'C22 H38 N4 Ni'
_chemical_formula_weight         417.27
_chemical_name_systematic
; 

 Bis-{1,3-di(isopropyl)-imidazol-2-ylidene}(h2-dimethyl acethylene)nickel(0)
;
_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                98.42(3)
_cell_angle_beta                 91.06(3)
_cell_angle_gamma                90.03(3)
_cell_formula_units_Z            8
_cell_length_a                   15.974(3)
_cell_length_b                   16.264(3)
_cell_length_c                   21.793(4)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      25.8
_cell_measurement_theta_min      2.15
_cell_volume                     5599.8(18)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.948
_diffrn_measured_fraction_theta_max 0.948
_diffrn_measurement_device_type  'STOE IPDS I'
_diffrn_measurement_method       rotation
_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  0.1523
_diffrn_reflns_av_sigmaI/netI    0.1435
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            33563
_diffrn_reflns_theta_full        23.26
_diffrn_reflns_theta_max         23.26
_diffrn_reflns_theta_min         2.10
_exptl_absorpt_coefficient_mu    0.704
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    0.990
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1808
_exptl_crystal_size_max          0.75
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.25
_refine_diff_density_max         1.788
_refine_diff_density_min         -0.883
_refine_diff_density_rms         0.156
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     973
_refine_ls_number_reflns         15246
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.1433
_refine_ls_R_factor_gt           0.1003
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2691
_refine_ls_wR_factor_ref         0.3106
_reflns_number_gt                9620
_reflns_number_total             15246
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om0604223si20060516_100545.cif
_cod_data_source_block           compound5
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        5600(2)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4074122