Synthesis of NPN-Coordinated Tantalum Alkyl Complexes and Their Hydrogenolysis: Isolation of a Terminal Tantalum Hydride Incorporating a Doubly Cyclometalated NPN Scaffold
Batke, Sonja; Sietzen, Malte; Wadepohl, Hubert; Ballmann, Joachim; Inorganic Chemistry  (2017) –; doi:10.1021/acs.inorgchem.7b00277

data_4345719
_publ_section_title
;
 Synthesis of NPN-Coordinated Tantalum Alkyl Complexes and Their
 Hydrogenolysis: Isolation of a Terminal Tantalum Hydride Incorporating a
 Doubly Cyclometalated NPN Scaffold
;
_journal_name_full               'Inorganic Chemistry'
_journal_paper_doi               10.1021/acs.inorgchem.7b00277
_journal_year                    2017
_chemical_formula_moiety         'C37 H40 N2 P Ta'
_chemical_formula_sum            'C37 H40 N2 P Ta'
_chemical_formula_weight         724.63
_chemical_properties_physical    'air-sensitive, moisture-sensitive'
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_block_code                ba_sb24
_audit_creation_date             2016-09-05
_audit_creation_method
;
Olex2 1.2
(compiled Aug 23 2016 16:59:57 for OlexSys, GUI svn.r5221)
;
_audit_update_record
'05.09.2016 16:37:32 CEST UTC+02:00  encif 1.46'
_cell_angle_alpha                101.690(8)
_cell_angle_beta                 95.415(13)
_cell_angle_gamma                99.097(9)
_cell_formula_units_Z            2
_cell_length_a                   8.697(4)
_cell_length_b                   9.920(4)
_cell_length_c                   22.130(11)
_cell_measurement_reflns_used    7800
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.17
_cell_measurement_theta_min      2.39
_cell_volume                     1830.3(14)
_computing_cell_refinement
;
SAINT (see _computing_data_reduction). Includes estimated systematic errors
 of the unit cell constants from Monte Carlo simulations.
;
_computing_data_collection       'SMART-5.631 (Bruker AXS, 2003)'
_computing_data_reduction
'SAINT (Bruker AXS, 1997-2013),SADABS-2014_4 (Sheldrick and Bruker AXS, 1997-2014)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material
'encif (Wadepohl, 2009-15); encifer 1.5 (CCDC, 2014)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SUPERFLIP (Palatinus, 2007-2009)'
_diffrn_ambient_environment      'perfluoro polyether oil / N~2~'
_diffrn_ambient_temperature      100(1)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.19
_diffrn_detector_type            CCD-PXL-KAF2
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.932
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker AXS Smart 1000'
_diffrn_measurement_method       '\f- and \w-scans'
_diffrn_measurement_specimen_support 'polyimid foil'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0477
_diffrn_reflns_av_unetI/netI     0.0484
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.932
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       33
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            47423
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.932
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         32.462
_diffrn_reflns_theta_min         0.948
_diffrn_source                   'sealed X-Ray tube (Mo)'
_diffrn_source_type              'fine focus tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.070
_exptl_absorpt_correction_T_max  0.7792
_exptl_absorpt_correction_T_min  0.6660
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements (Blessing 1995)
SADABS (see _computing_data_reduction)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.315
_exptl_crystal_description       plate
_exptl_crystal_F_000             728
_exptl_crystal_size_max          0.150
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.040
_refine_diff_density_max         2.841
_refine_diff_density_min         -2.227
_refine_diff_density_rms         0.136
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     416
_refine_ls_number_reflns         12319
_refine_ls_number_restraints     99
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0338
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0271P)^2^+1.8302P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0680
_refine_ls_wR_factor_ref         0.0702
_reflns_Friedel_coverage         0.000
_reflns_number_gt                10950
_reflns_number_total             12319
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ic7b00277_si_002.cif
_cod_data_source_block           ba_sb24_sq
_cod_original_cell_volume        1830.3(15)
_cod_database_code               4345719
_audit_block_refno               2320
_shelx_estimated_absorpt_t_max   0.887
_shelx_estimated_absorpt_t_min   0.656
_shelxl_version_number           2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 C30A-C34A \\sim C32A-C34A \\sim C30B-C34B \\sim C32B-C34B
 with sigma of 0.02
 P-C28A \\sim P-C28B
 with sigma of 0.02
3. Restrained atomic chiral volume
 C31A, C31B
 fixed at 0 with sigma of 0.1
4. Uiso/Uaniso restraints and constraints
C28A \\sim C29A \\sim C30A \\sim C31A \\sim C32A \\sim C33A \\sim C34A: within
0.5A with sigma of 0.02 and sigma for terminal atoms of 0.02
C28B \\sim C29B \\sim C30B \\sim C31B \\sim C32B \\sim C33B \\sim C34B: within
0.5A with sigma of 0.02 and sigma for terminal atoms of 0.02
5. Rigid body (RIGU) restrains
 C28A, C29A, C30A, C31A, C32A, C33A, C34A
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
 C28B, C29B, C30B, C31B, C32B, C33B, C34B
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
6. Others
 Sof(C28B)=Sof(C29B)=Sof(H29B)=Sof(C30B)=Sof(H30B)=Sof(C31B)=Sof(C32B)=
 Sof(H32B)=Sof(C33B)=Sof(H33B)=Sof(C34B)=Sof(H34D)=Sof(H34E)=Sof(H34F)=1-FVAR(1)
 Sof(C28A)=Sof(C29A)=Sof(H29A)=Sof(C30A)=Sof(H30A)=Sof(C31A)=Sof(C32A)=
 Sof(H32A)=Sof(C33A)=Sof(H33A)=Sof(C34A)=Sof(H34A)=Sof(H34B)=Sof(H34C)=FVAR(1)
7.a Secondary CH2 refined with riding coordinates:
 C1(H1A,H1B), C8(H8A,H8B)
7.b Aromatic/amide H refined with riding coordinates:
 C4(H4), C5(H5), C6(H6), C7(H7), C11(H11), C12(H12), C13(H13), C14(H14),
 C16(H16), C17(H17), C18(H18), C19(H19), C20(H20), C22(H22), C23(H23), C25(H25),
  C26(H26), C29A(H29A), C30A(H30A), C32A(H32A), C33A(H33A), C29B(H29B),
 C30B(H30B), C32B(H32B), C33B(H33B)
7.c Fitted hexagon refined as free rotating group:
 C28A(C29A,C30A,C31A,C32A,C33A), C28B(C29B,C30B,C31B,C32B,C33B)
7.d Idealised Me refined as rotating group:
 C27(H27A,H27B,H27C), C34A(H34A,H34B,H34C), C34B(H34D,H34E,H34F), C35(H35A,
 H35B,H35C), C36(H36A,H36B,H36C), C37(H37A,H37B,H37C)
;
_shelx_res_checksum              69897
_shelx_hkl_checksum              67542
_shelx_fab_checksum              7752
_olex2_submission_special_instructions 'No special instructions were received'
_platon_squeeze_void_probe_radius 1.20