Chemistry of C-Trimethylsilyl-Substituted Heterocarboranes. 31. New Insights into Reaction Pathways of Carborane Ligand Systems: Synthetic, Structural, Spectroscopic, and Electrochemical Studies on Sandwich and Half-Sandwich Metallacarboranes of Iron, Cobalt, and Nickel
Tomlinson, Susan; Zheng, Chong; Hosmane, Narayan S.; Yang, Jimin; Wang, Ying; Zhang, Hongming; Gray, Thomas G.; Demissie, Temesgen; Maguire, John A.; Baumann, Frank; Klein, Axel; Sarkar, Biprajit; Kaim, Wolfgang; Lipscomb, William N.; Organometallics 24 (2005) 2177–2187; doi:10.1021/om048982u

data_4060291
_publ_section_title
;
Chemistry of C-Trimethylsilyl-Substituted Heterocarboranes. 31. New Insights 
into Reaction Pathways of Carborane Ligand Systems: Synthetic, Structural, 
Spectroscopic, and Electrochemical Studies on Sandwich and Half-Sandwich 
Metallacarboranes of Iron, Cobalt, and Nickel
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              2177
_journal_page_last               2187
_journal_paper_doi               10.1021/om048982u
_journal_volume                  24
_journal_year                    2005
_chemical_formula_sum            'C21 H55 B8 N2 Ni Si4'
_chemical_formula_weight         593.22
_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                 112.33(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.788(5)
_cell_length_b                   10.130(2)
_cell_length_c                   21.049(5)
_cell_measurement_reflns_used    30
_cell_measurement_temperature    230(2)
_cell_measurement_theta_max      15.0
_cell_measurement_theta_min      10.0
_cell_volume                     3508.4(15)
_computing_cell_refinement       'Siemens XSCANS'
_computing_data_collection       'Siemens XSCANS'
_computing_data_reduction        'Siemens XSCANS'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      230(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Siemens P3'
_diffrn_measurement_method       'omega scans'
_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  0.017
_diffrn_reflns_av_sigmaI/netI    0.032
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -2
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            4475
_diffrn_reflns_theta_full        22.00
_diffrn_reflns_theta_max         22.00
_diffrn_reflns_theta_min         1.99
_diffrn_standards_decay_%        n/a
_diffrn_standards_interval_count 200
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.704
_exptl_absorpt_correction_T_max  0.899
_exptl_absorpt_correction_T_min  0.802
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   'Siemens XEMP'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.123
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             1276
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.563
_refine_diff_density_min         -0.214
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     340
_refine_ls_number_reflns         4308
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.051
_refine_ls_R_factor_gt           0.034
_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^)+(0.0407P)^2^+2.5132P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.080
_refine_ls_wR_factor_ref         0.089
_reflns_number_gt                3488
_reflns_number_total             4308
_reflns_threshold_expression     >2sigma(I)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4060291