An Unsaturated Nickel(0) NHC Catalyst: Facile Preparation and Structure of Ni(0)(NHC)2, Featuring a Reduction Process from Ni(II)(NHC)(acac)2
Matsubara, Kouki; Miyazaki, Satoshi; Koga, Yuji; Nibu, Yoshinori; Hashimura, Takaaki; Matsumoto, Taisuke; Organometallics 27 (2008) 6020–; doi:10.1021/om800488x

data_4071962
_publ_section_title
;
 An Unsaturated Nickel(0) NHC Catalyst: Facile Preparation and Structure
 of Ni(0)(NHC)2, Featuring a Reduction Process from Ni(II)(NHC)(acac)2
;
_journal_issue                   22
_journal_name_full               Organometallics
_journal_page_first              6020
_journal_paper_doi               10.1021/om800488x
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C31 H38 N2 Ni O4'
_chemical_formula_weight         561.34
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 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                 98.136(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.869(8)
_cell_length_b                   7.748(4)
_cell_length_c                   24.023(12)
_cell_measurement_reflns_used    5556
_cell_measurement_temperature    123.1
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.0
_cell_volume                     2924(3)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalStructure
_computing_molecular_graphics    'ORTEP3 for Windows'
_computing_publication_material  'SHELXL-97/2 (Sheldrick,1997)'
_computing_structure_refinement  SHELXL
_computing_structure_solution    SIR2002
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.957
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'Rigaku Saturn'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.1478
_diffrn_reflns_av_sigmaI/netI    0.1252
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            27174
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         3.00
_exptl_absorpt_coefficient_mu    0.700
_exptl_absorpt_correction_T_max  0.932
_exptl_absorpt_correction_T_min  0.643
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Green
_exptl_crystal_density_diffrn    1.275
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prizm
_exptl_crystal_F_000             1192
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.604
_refine_diff_density_min         -0.705
_refine_diff_density_rms         0.113
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     344
_refine_ls_number_reflns         6375
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.1186
_refine_ls_R_factor_gt           0.0698
_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^)+(0.0909P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1750
_refine_ls_wR_factor_ref         0.2029
_reflns_number_gt                3855
_reflns_number_total             6375
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om800488x_si_002.cif
_cod_data_source_block           1b
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               4071962