Tantalum Alkyl and Silyl Complexes of the Bulky (Terphenyl)imido Ligand [2,6-(2,4,6-Me3C6H2)2C6H3N]2-([Ar*N]2-). Generation and Reactivity of [(Ar*N)(Ar*NH)Ta(H)(OSO2CF3)], Which Reversibly Transfers Hydride to an Aromatic Ring of the Arylamide Ligand
Gavenonis, John; Tilley, T. Don; Organometallics 21 (2002) 5549–; doi:10.1021/om020509y

data_4077052
_publ_section_title
;
 Tantalum Alkyl and Silyl Complexes of the Bulky (Terphenyl)imido Ligand
 [2,6-(2,4,6-Me3C6H2)2C6H3N]2-([Ar*N]2-). Generation and Reactivity of
 [(Ar*N)(Ar*NH)Ta(H)(OSO2CF3)], Which Reversibly Transfers Hydride to an
 Aromatic Ring of the Arylamide Ligand
;
_journal_issue                   25
_journal_name_full               Organometallics
_journal_page_first              5549
_journal_paper_doi               10.1021/om020509y
_journal_volume                  21
_journal_year                    2002
_chemical_formula_moiety         'C50 H57 N2 Ta '
_chemical_formula_sum            'C50 H57 N2 Ta'
_chemical_formula_weight         866.96
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 104.766(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.2430(7)
_cell_length_b                   11.1702(5)
_cell_length_c                   21.552(1)
_cell_measurement_reflns_used    2701
_cell_measurement_temperature    161.2
_cell_measurement_theta_max      45.0
_cell_measurement_theta_min      4.0
_cell_volume                     4246.8(3)
_computing_cell_refinement       'Bruker SAINT v5.04'
_computing_data_collection       'Bruker SMART v5.052d'
_computing_data_reduction        'Bruker SAINT v5.04'
_computing_publication_material  teXsan
_computing_structure_refinement  teXsan
_computing_structure_solution    SIR92
_diffrn_ambient_temperature      161.2
_diffrn_measurement_device_type  'SMART CCD'
_diffrn_measurement_method       \w-scan
_diffrn_orient_matrix_UB_11      0.00000
_diffrn_orient_matrix_UB_12      0.00000
_diffrn_orient_matrix_UB_13      0.00000
_diffrn_orient_matrix_UB_21      0.00000
_diffrn_orient_matrix_UB_22      0.00000
_diffrn_orient_matrix_UB_23      0.00000
_diffrn_orient_matrix_UB_31      0.00000
_diffrn_orient_matrix_UB_32      0.00000
_diffrn_orient_matrix_UB_33      0.00000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0615
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            19234
_diffrn_reflns_theta_max         26.0
_diffrn_reflns_theta_min         1.7
_diffrn_standards_decay_%        0.00
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.619
_exptl_absorpt_correction_T_max  0.98
_exptl_absorpt_correction_T_min  0.69
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Blessing, 1995'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.356
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1776.00
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.130
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.83
_refine_diff_density_min         -0.51
_refine_ls_extinction_coef       0.00000
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.650
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     481
_refine_ls_number_reflns         3140
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.1008
_refine_ls_R_factor_gt           0.0272
_refine_ls_shift/su_max          0.0010
_refine_ls_structure_factor_coef F
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_all         0.0380
_refine_ls_wR_factor_gt          0.0243
_refine_ls_wR_factor_ref         0.0243
_reflns_number_gt                3140
_reflns_number_total             8557
_reflns_threshold_expression     I>3.00sigma
_cod_data_source_file            om020509y.cif
_cod_data_source_block           Complex_4
_cod_original_cell_volume        4246.7(3)
_cod_original_sg_symbol_H-M      'P 21/c     '
_cod_original_formula_sum        'C50 H57 N2 Ta '
_cod_database_code               4077052