Bis(ether-functionalized NHC) Nickel(II) Complexes,TranstoCisIsomerization Triggered by Water Coordination, and Catalytic Ethylene Oligomerization
Hameury, Sophie; de Frémont, Pierre; Breuil, Pierre-Alain R.; Olivier-Bourbigou, Hélène; Braunstein, Pierre; Organometallics 34 (2015) 2183–; doi:10.1021/om5008506

data_4084550
_publ_section_title
;
 Bis(ether-functionalized NHC) Nickel(II)
 Complexes,TranstoCisIsomerization Triggered by Water Coordination, and
 Catalytic Ethylene Oligomerization
;
_journal_issue                   11
_journal_name_full               Organometallics
_journal_page_first              2183
_journal_paper_doi               10.1021/om5008506
_journal_volume                  34
_journal_year                    2015
_chemical_formula_moiety         'C20 H36 Br2 N4 Ni O2'
_chemical_formula_sum            'C20 H36 Br2 N4 Ni O2'
_chemical_formula_weight         583.06
_chemical_name_common            '[NiBr2{ImnBu(EtOMe)}2]'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 91.023(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.1760(10)
_cell_length_b                   12.8400(4)
_cell_length_c                   20.9060(11)
_cell_measurement_reflns_used    5779
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      0.998
_cell_volume                     5146.7(4)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Bruker AXS BV, 1997-2004)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'Sir 97'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0433
_diffrn_reflns_av_unetI/netI     0.0632
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            9210
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.71
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    3.881
_exptl_absorpt_correction_T_max  0.2854
_exptl_absorpt_correction_T_min  0.2688
_exptl_absorpt_correction_type   cylinder
_exptl_absorpt_process_details
;
Interpolation using  Int.Tab. Vol. C (1992) p. 523,Tab. 6.3.3.3
for values of muR in the range 0-2.5, and Int.Tab. Vol.II (1959)
p.302; Table 5.3.6 B for muR in the range 2.6-10.0.
The interpolation procedure of C.W.Dwiggins Jr (Acta Cryst.(1975)
A31,146-148) is used with some modification.
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.505
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prisms
_exptl_crystal_F_000             2384
_exptl_crystal_recrystallization_method 'THF - Pentane'
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.929
_refine_diff_density_min         -0.489
_refine_diff_density_rms         0.081
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     287
_refine_ls_number_reflns         5051
_refine_ls_number_restraints     278
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0908
_refine_ls_R_factor_gt           0.0455
_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^)+(0.0487P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0926
_refine_ls_wR_factor_ref         0.1021
_reflns_number_gt                3231
_reflns_number_total             5051
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om5008506_si_002.cif
_cod_data_source_block           compound_10
_cod_depositor_comments
'Adding full bibliography for 4084545--4084559.cif.'
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               4084550