1,2-Addition and cycloaddition reactions of niobium bis(imido) and oxo imido complexes
Fostvedt, Jade I.; Grant, Lauren N.; Kriegel, Benjamin M.; Obenhuber, Andreas H.; Lohrey, Trevor D.; Bergman, Robert G.; Arnold, John; Chemical Science  (2020) –; doi:10.1039/D0SC03489D

data_1559316
_publ_section_title
;
 1,2-Addition and cycloaddition reactions of niobium bis(imido) and oxo
 imido complexes
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D0SC03489D
_journal_year                    2020
_chemical_formula_moiety         'Nb O2 N4 C46 H67, C4 H10 O'
_chemical_formula_sum            'C50 H77 N4 Nb O3'
_chemical_formula_weight         875.06
_chemical_melting_point          408
_chemical_name_common            (BDI)Nb(NAr)(N(tBu)CO2)
_chemical_name_systematic
'(N-tert-butylcarbamidato-N,O)-(2,6-diisopropylphenyl)imino-(N,N?-bis(2,6-diisopropylphenyl)-3,5-dimethyl-B-diketiminato)-niobium(V) diethyl ether solvate'
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2020-05-14 deposited with the CCDC.	2020-10-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 106.2880(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.1386(6)
_cell_length_b                   13.7454(5)
_cell_length_c                   19.8912(7)
_cell_measurement_reflns_used    9824
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.37
_cell_measurement_theta_min      2.59
_cell_volume                     4760.3(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    ORTEP-32
_computing_publication_material  WinGX
_computing_structure_refinement  SHELXL-2014
_computing_structure_solution    SHELXT
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.366
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0524
_diffrn_reflns_av_unetI/netI     0.0500
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            27774
_diffrn_reflns_point_group_measured_fraction_full 0.903
_diffrn_reflns_point_group_measured_fraction_max 0.895
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.370
_diffrn_reflns_theta_min         1.888
_diffrn_source                   'microfocus sealed tube'
_exptl_absorpt_coefficient_mu    0.297
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.7071
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.221
_exptl_crystal_description       block
_exptl_crystal_F_000             1880
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Diethyl ether'
_exptl_crystal_size_max          0.120
_exptl_crystal_size_mid          0.080
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.623
_refine_diff_density_min         -0.372
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
; 
 Flack x determined using 3135 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.038(15)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     542
_refine_ls_number_reflns         7825
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.0347
_refine_ls_R_factor_gt           0.0325
_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^)+(0.0360P)^2^+2.8809P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0770
_refine_ls_wR_factor_ref         0.0784
_reflns_Friedel_coverage         0.790
_reflns_Friedel_fraction_full    0.806
_reflns_Friedel_fraction_max     0.791
_reflns_number_gt                7465
_reflns_number_total             7825
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc03489d2.cif
_cod_data_source_block           shelx_CCDC2
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               1559316
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.965
_shelx_estimated_absorpt_t_max   0.985
_shelx_res_checksum              21488