Pnictogen-Hydride Activation by (silox)3Ta (silox =tBu3SiO); Attempts to Circumvent the Constraints of Orbital Symmetry in N2 Activation
Elliott B. Hulley; Jeffrey B. Bonanno; Peter T. Wolczanski; Thomas R. Cundari; Emil B. Lobkovsky; Inorganic Chemistry 49 (2010) 8524–8544; doi:10.1021/ic101147x

data_4316537
_publ_section_title
;
 Pnictogen-Hydride Activation by (silox)3Ta (silox =tBu3SiO); Attempts to
 Circumvent the Constraints of Orbital Symmetry in N2 Activation
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              8524
_journal_page_last               8544
_journal_paper_doi               10.1021/ic101147x
_journal_volume                  49
_journal_year                    2010
_chemical_formula_moiety         'C55 H96 O3 P Si3 Ta'
_chemical_formula_sum            'C55 H96 O3 P Si3 Ta'
_chemical_formula_weight         1101.51
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.1200(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.8368(2)
_cell_length_b                   22.2055(4)
_cell_length_c                   22.1197(4)
_cell_measurement_reflns_used    8977
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.48
_cell_measurement_theta_min      2.52
_cell_volume                     5813.97(18)
_computing_cell_refinement       'Bruker SAINT+'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT+'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker X8 APEX II diffractometer'
_diffrn_measurement_method       'phi and 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  0.0766
_diffrn_reflns_av_sigmaI/netI    0.0747
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            73173
_diffrn_reflns_theta_full        30.53
_diffrn_reflns_theta_max         30.53
_diffrn_reflns_theta_min         1.84
_exptl_absorpt_coefficient_mu    2.018
_exptl_absorpt_correction_T_max  0.7517
_exptl_absorpt_correction_T_min  0.6324
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.258
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         1.274
_refine_diff_density_min         -0.648
_refine_diff_density_rms         0.127
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     568
_refine_ls_number_reflns         17745
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0674
_refine_ls_R_factor_gt           0.0404
_refine_ls_shift/su_max          0.022
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0260P)^2^+0.0173P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0739
_refine_ls_wR_factor_ref         0.0824
_reflns_number_gt                12757
_reflns_number_total             17745
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic101147x_si_001_2.cif
_cod_data_source_block           eh3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_database_code               4316537