Bulky bis(aryl)triazenides: just aspiring amidinates? A structural and spectroscopic study.
Gyton, Matthew R.; Leverett, Anthony R.; Cole, Marcus L.; McKay, Alasdair I.; Dalton transactions (Cambridge, England : 2003) 49 (2020) 5653–5661; doi:10.1039/d0dt00285b

data_7703879
_publ_section_title
;
 Bulky bis(aryl)triazenides: just aspiring amidinates? A structural and
 spectroscopic study.
;
_journal_issue                   17
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5653
_journal_page_last               5661
_journal_paper_doi               10.1039/d0dt00285b
_journal_volume                  49
_journal_year                    2020
_chemical_formula_moiety         'C32 H54 Li N3 O2'
_chemical_formula_sum            'C32 H54 Li N3 O2'
_chemical_formula_weight         519.72
_chemical_name_systematic        '[Li(OEt2)2(N3Dipp2)]'
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-12-08
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-12-14 deposited with the CCDC.	2020-03-31 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 104.9150(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.5557(5)
_cell_length_b                   11.0635(3)
_cell_length_c                   18.9451(6)
_cell_measurement_reflns_used    7817
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      26.14
_cell_measurement_theta_min      2.35
_cell_volume                     3353.15(17)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_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    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0601
_diffrn_reflns_av_unetI/netI     0.0473
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            39776
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.131
_diffrn_reflns_theta_min         2.238
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.063
_exptl_absorpt_correction_T_max  0.7455
_exptl_absorpt_correction_T_min  0.6772
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2014/5 (Bruker,2014/5) was used for absorption correction. wR2(int) was 0.1145 before and 0.0624 after correction. The Ratio of minimum to maximum transmission is 0.9084. The \l/2 correction factor is 0.00150.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.029
_exptl_crystal_description       block
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.625
_refine_diff_density_min         -0.311
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     375
_refine_ls_number_reflns         7364
_refine_ls_number_restraints     44
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0979
_refine_ls_R_factor_gt           0.0613
_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^)+(0.0900P)^2^+1.4861P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1647
_refine_ls_wR_factor_ref         0.1900
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4870
_reflns_number_total             7364
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0dt00285b2.cif
_cod_data_source_block           5(OEt2)2
_cod_depositor_comments
'Adding full bibliography for 7703878--7703902.cif.'
_cod_database_code               7703879
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.994
_shelx_estimated_absorpt_t_min   0.988
_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
 C28-C27 \\sim C28A-C27A
 with sigma of 0.02
 O1-C27 \\sim O1-C27A
 with sigma of 0.02
3. Uiso/Uaniso restraints and constraints
O1 \\sim C27A \\sim C28A: within 2A with sigma of 0.04 and sigma for terminal
atoms of 0.08
O1 \\sim C27 \\sim C28: within 2A with sigma of 0.04 and sigma for terminal
atoms of 0.08
4. Rigid body (RIGU) restrains
 O1, C27A, C28A
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
 O1, C27, C28
 with sigma for 1-2 distances of 0.004 and sigma for 1-3 distances of 0.004
5. Others
 Sof(C27A)=Sof(H27A)=Sof(H27B)=Sof(C28A)=Sof(H28A)=Sof(H28B)=Sof(H28C)=1-FVAR(1)
 Sof(C28)=Sof(H28D)=Sof(H28E)=Sof(H28F)=Sof(C27)=Sof(H27C)=Sof(H27D)=FVAR(1)
6.a Ternary CH refined with riding coordinates:
 C22(H22), C19(H19), C7(H7), C10(H10)
6.b Secondary CH2 refined with riding coordinates:
 C31(H31A,H31B), C29(H29A,H29B), C25(H25A,H25B), C27A(H27A,H27B), C27(H27C,H27D)
6.c Aromatic/amide H refined with riding coordinates:
 C15(H15), C17(H17), C16(H16), C5(H5), C3(H3), C4(H4)
6.d Idealised Me refined as rotating group:
 C24(H24A,H24B,H24C), C9(H9A,H9B,H9C), C30(H30A,H30B,H30C), C8(H8A,H8B,H8C),
 C32(H32A,H32B,H32C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C26(H26A,H26B,
 H26C), C23(H23A,H23B,H23C), C12(H12A,H12B,H12C), C11(H11A,H11B,H11C),
 C28A(H28A,H28B,H28C), C28(H28D,H28E,H28F)
;
_shelx_res_checksum              60665
_olex2_submission_special_instructions 'No special instructions were received'