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_4117394
_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            'C27 H36 Cl P2 Ta'
_chemical_formula_weight         638.90
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 117.349(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   26.179(3)
_cell_length_b                   13.3008(15)
_cell_length_c                   16.988(2)
_cell_measurement_reflns_used    9980
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      31.05
_cell_measurement_theta_min      2.45
_cell_volume                     5254.1(11)
_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      170(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  0.0471
_diffrn_reflns_av_sigmaI/netI    0.0393
_diffrn_reflns_limit_h_max       38
_diffrn_reflns_limit_h_min       -38
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            43742
_diffrn_reflns_theta_full        31.50
_diffrn_reflns_theta_max         31.50
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    4.420
_exptl_absorpt_correction_T_max  0.7187
_exptl_absorpt_correction_T_min  0.3605
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            ORANGE
_exptl_crystal_density_diffrn    1.615
_exptl_crystal_description       BLOCK
_exptl_crystal_F_000             2544
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.878
_refine_diff_density_min         -0.777
_refine_diff_density_rms         0.124
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     297
_refine_ls_number_reflns         8756
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0603
_refine_ls_R_factor_gt           0.0320
_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^)+(0.0273P)^2^+8.3349P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0620
_refine_ls_wR_factor_ref         0.0721
_reflns_number_gt                6227
_reflns_number_total             8756
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja210404x_si_008.cif
_cod_data_source_block           pmcs10
_cod_original_cell_volume        5254.1(10)
_cod_database_code               4117394