Conversion of dinitrogen to tris(trimethylsilyl)amine catalyzed by titanium triamido-amine complexes
Okuda, Jun; Spaniol, Thomas Paul; Kögerler, Paul; Ghana, Priyabrata; van Kruechten, Franziska D.; van Leusen, Jan; Chemical Communications  (2019) –; doi:10.1039/C8CC09742A

data_7123011
_publ_section_title
;
 Conversion of dinitrogen to tris(trimethylsilyl)amine catalyzed by
 titanium triamido-amine complexes
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C8CC09742A
_journal_year                    2019
_chemical_formula_moiety         'C68 H94 K2 N10 O2 Ti2'
_chemical_formula_sum            'C68 H94 K2 N10 O2 Ti2'
_chemical_formula_weight         1257.53
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2018-11-16
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2018-12-04 deposited with the CCDC.    2019-02-13 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.472(3)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.9665(4)
_cell_length_b                   13.9590(5)
_cell_length_c                   19.5766(6)
_cell_measurement_reflns_used    60467
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.20
_cell_measurement_theta_min      1.79
_cell_volume                     3267.04(19)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SIR97 (Burla et al.,  2007)'
_diffrn_ambient_temperature      100.15
_diffrn_detector                 'Hybrid Pixel Counting Detector'
_diffrn_detector_area_resol_mean 5.81
_diffrn_detector_type            'Dectris Pilatus 200K'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_details      '4797 frames, detector distance = 60 mm'
_diffrn_measurement_device       '4-circle diffractometer'
_diffrn_measurement_device_type  'STOE STADIVARI'
_diffrn_measurement_method       'rotation method, \w scans'
_diffrn_radiation_collimation    '0.6 mm diameter'
_diffrn_radiation_monochromator  'Graded multilayer mirror'
_diffrn_radiation_polarisn_norm  270
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1103
_diffrn_reflns_av_unetI/netI     0.0785
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            87675
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.349
_diffrn_reflns_theta_min         2.034
_diffrn_source                   'Genix Mo'
_diffrn_source_current           1.000
_diffrn_source_power             0.050
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    0.424
_exptl_absorpt_correction_T_max  0.8610
_exptl_absorpt_correction_T_min  0.0057
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
STOE X-Red32, absorption correction by Gaussian integration, analogous to
P. Coppens, "The Evaluation of Absorption and Extinction in Single-Crystal
Structure Analysis", published in: F. R. Ahmed (Editor), "Crystallographic
Computing", Munksgaard, Copenhagen (1970), 255 - 270.
Afterwards scaling of reflection intensities was performed within STOE LANA.
J. Koziskova, F. Hahn, J. Richter, J. Kozisek, "Comparison of different
absorption corrections on the model structure of tetrakis(\m~2~-acetato)-
diaqua-di-copper(II)", Acta Chimica Slovaca, vol. 9, no. 2, 2016, pp. 136 - 140.
Finally a spherical absorption correction was done within STOE LANA.
;
_exptl_crystal_colour            orange
_exptl_crystal_colour_primary    orange
_exptl_crystal_density_diffrn    1.278
_exptl_crystal_description       block
_exptl_crystal_F_000             1340
_exptl_crystal_preparation
;
Crystallization from benzene / n-pentane mixture at +10 \%C.
;
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: benzene and n-pentane'
_exptl_crystal_size_max          0.56
_exptl_crystal_size_mid          0.473
_exptl_crystal_size_min          0.35
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.292
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.38(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.960
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     770
_refine_ls_number_reflns         11954
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.960
_refine_ls_R_factor_all          0.0881
_refine_ls_R_factor_gt           0.0544
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0716P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1181
_refine_ls_wR_factor_ref         0.1315
_reflns_Friedel_coverage         0.914
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                8419
_reflns_number_total             11954
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cc09742a2.cif
_cod_data_source_block           3
_cod_database_code               7123011
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.866
_shelx_estimated_absorpt_t_min   0.797
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.62(4)
 0.38(4)
2. 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
3.a Secondary CH2 refined with riding coordinates:
 C9(H9A,H9B), C10(H10A,H10B), C19(H19A,H19B), C20(H20A,H20B), C29(H29A,H29B),
 C30(H30A,H30B), C39(H39A,H39B), C40(H40A,H40B), C49(H49A,H49B), C50(H50A,H50B),
  C59(H59A,H59B), C60(H60A,H60B), C61(H61A,H61B), C62(H62A,H62B), C63(H63A,
 H63B), C64(H64A,H64B), C65(H65A,H65B), C66(H66A,H66B), C67(H67A,H67B),
 C68(H68A,H68B)
3.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C4(H4), C6(H6), C12(H12), C14(H14), C16(H16), C22(H22), C24(H24),
 C26(H26), C32(H32), C34(H34), C36(H36), C42(H42), C44(H44), C46(H46), C52(H52),
  C54(H54), C56(H56)
3.c Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C8(H8A,H8B,H8C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C),
 C27(H27A,H27B,H27C), C28(H28A,H28B,H28C), C37(H37A,H37B,H37C), C38(H38A,H38B,
 H38C), C47(H47A,H47B,H47C), C48(H48A,H48B,H48C), C57(H57A,H57B,H57C), C58(H58A,
 H58B,H58C)
;
_shelx_res_checksum              65126
_olex2_submission_original_sample_id JO_00434
_olex2_submission_special_instructions 'No special instructions were received'