A Nickel(II)-Cornered Molecular Rectangle with Biscarbene and 4,4′-Bipyridine Bridging Groups
Hahn, F. Ekkehardt; Radloff, Christian; Pape, Tania; Hepp, Alexander; Organometallics 27 (2008) 6408–; doi:10.1021/om801007u

data_4072432
_publ_section_title
;
 A Nickel(II)-Cornered Molecular Rectangle with Biscarbene and
 4,4&#x2032;-Bipyridine Bridging Groups
;
_journal_issue                   24
_journal_name_full               Organometallics
_journal_page_first              6408
_journal_paper_doi               10.1021/om801007u
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C41 H56 Br2 N4 Ni2'
_chemical_formula_weight         882.14
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 96.0980(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.3023(14)
_cell_length_b                   23.345(2)
_cell_length_c                   23.2655(19)
_cell_measurement_reflns_used    900
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      22.5
_cell_measurement_theta_min      1
_cell_volume                     9344.3(13)
_computing_cell_refinement       'APEX2(Bruker AXS, 2007)'
_computing_data_collection       'APEX2(Bruker AXS, 2007)'
_computing_data_reduction        'SAINT,SADABS (Bruker AXS, 2007 )'
_computing_molecular_graphics
;
ORTEP3,L.J. Farrugia, J. Appl. Cryst. (1997) 30, 565
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_detector_area_resol_mean 80
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'Omega and Phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1490
_diffrn_reflns_av_sigmaI/netI    0.1421
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            55925
_diffrn_reflns_theta_full        24.18
_diffrn_reflns_theta_max         24.18
_diffrn_reflns_theta_min         1.18
_exptl_absorpt_coefficient_mu    2.545
_exptl_absorpt_correction_T_max  0.8833
_exptl_absorpt_correction_T_min  0.7499
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 Corrections were done with the SADABS program, utilizing the none merged
 raw data obtained from the integration process. Integration and final cell
 refinement were done with SAINT.

 SADABS reports ratio of Tmin/Tmax = 0.768428 

;
_exptl_crystal_colour            'intense red'
_exptl_crystal_density_diffrn    1.254
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent sticks'
_exptl_crystal_F_000             3648
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         1.715
_refine_diff_density_min         -0.671
_refine_diff_density_rms         0.166
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     826
_refine_ls_number_reflns         14800
_refine_ls_number_restraints     28
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.1906
_refine_ls_R_factor_gt           0.0859
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1704P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2493
_refine_ls_wR_factor_ref         0.3137
_reflns_number_gt                6801
_reflns_number_total             14800
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om801007u_si_003.cif
_cod_data_source_block           sad
_cod_original_cell_volume        9344.4(13)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4072432