A New Class of Transition Metal Pincer Ligand: Tantalum Complexes that Feature a [CCC] X3-Donor Array Derived from a Terphenyl Ligand
Aaron Sattler; Gerard Parkin; Journal of the American Chemical Society 134 (2012) 2355–2366; doi:10.1021/ja210404x

data_4117392
_publ_section_title
;
 A New Class of Transition Metal Pincer Ligand: Tantalum Complexes that
 Feature a [CCC] X3-Donor Array Derived from a Terphenyl Ligand
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2355
_journal_page_last               2366
_journal_paper_doi               10.1021/ja210404x
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C20 H17 I'
_chemical_formula_weight         384.24
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   7.5927(5)
_cell_length_b                   19.6428(13)
_cell_length_c                   21.5544(14)
_cell_measurement_reflns_used    9702
_cell_measurement_temperature    125(2)
_cell_measurement_theta_max      32.29
_cell_measurement_theta_min      2.28
_cell_volume                     3214.7(4)
_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, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      125(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0394
_diffrn_reflns_av_sigmaI/netI    0.0284
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            51962
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         1.40
_exptl_absorpt_coefficient_mu    1.984
_exptl_absorpt_correction_T_max  0.9429
_exptl_absorpt_correction_T_min  0.3824
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            COLORLESS
_exptl_crystal_density_diffrn    1.588
_exptl_crystal_description       PLATE
_exptl_crystal_F_000             1520
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.575
_refine_diff_density_min         -0.465
_refine_diff_density_rms         0.085
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.023(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     384
_refine_ls_number_reflns         9789
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0287
_refine_ls_R_factor_gt           0.0247
_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^)+(0.0280P)^2^+0.7356P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0557
_refine_ls_wR_factor_ref         0.0575
_reflns_number_gt                9020
_reflns_number_total             9789
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja210404x_si_006.cif
_cod_data_source_block           ttpis10
_cod_database_code               4117392