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_1559319
_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         'C44 H72 B N4 Nb O4'
_chemical_formula_sum            'C44 H72 B N4 Nb O4'
_chemical_formula_weight         824.77
_chemical_melting_point          386
_chemical_name_common            (BDI)Nb(OC(H)O)(N[BO2C6H12]tBu)(NtBu)
_chemical_name_systematic
Formato-(N-(tert-butyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-amino)-(tert-butyl)imino-(N,N?-bis(2,6-diisopropylphenyl)-3,5-dimethyl-B-diketiminato)-niobium(V)
_chemical_properties_physical
Air-sensitive,Moisture-sensitive,Oxygen-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           7
_space_group_name_Hall           'P -2yac'
_space_group_name_H-M_alt        'P 1 n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2020-05-16
_audit_creation_method
;
Olex2 1.2
(compiled May 18 2018 14:05:52 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-05-17 deposited with the CCDC.	2020-10-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 96.552(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.5350(5)
_cell_length_b                   17.4460(8)
_cell_length_c                   20.5667(8)
_cell_measurement_reflns_used    9906
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.37
_cell_measurement_theta_min      2.31
_cell_volume                     4468.3(3)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      99.99
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.996
_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  0.0538
_diffrn_reflns_av_unetI/netI     0.0558
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_number            8187
_diffrn_reflns_point_group_measured_fraction_full 0.500
_diffrn_reflns_point_group_measured_fraction_max 0.499
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.392
_diffrn_reflns_theta_min         1.167
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.313
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.7242
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014) was used for absorption correction.
wR2(int) was 0.0906 before and 0.0538 after correction.
The Ratio of minimum to maximum transmission is 0.9718.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.226
_exptl_crystal_description       block
_exptl_crystal_F_000             1768
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: Hexamethyldisiloxane'
_exptl_crystal_size_max          0.1
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.616
_refine_diff_density_min         -0.357
_refine_diff_density_rms         0.070
_refine_ls_abs_structure_details
;
No quotients, so Flack parameter determined by classical intensity fit
;
_refine_ls_abs_structure_Flack   0.08(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1013
_refine_ls_number_reflns         8187
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0519
_refine_ls_R_factor_gt           0.0384
_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^)+(0.0313P)^2^+3.2854P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0778
_refine_ls_wR_factor_ref         0.0847
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    0.000
_reflns_Friedel_fraction_max     0.000
_reflns_number_gt                6977
_reflns_number_total             8187
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc03489d2.cif
_cod_data_source_block           bmkxr54
_cod_database_code               1559319
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.981
_shelx_estimated_absorpt_t_min   0.969
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C12(H12), C15(H15), C24(H24), C27(H27), C56(H56), C59(H59), C68(H68), C71(H71)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C8(H8), C9(H9), C10(H10), C20(H20), C21(H21), C22(H22), C44(H44),
 C46(H46), C52(H52), C53(H53), C54(H54), C64(H64), C65(H65), C66(H66), C88(H88)
2.c Idealised Me refined as rotating group:
 C4(H4A,H4B,H4C), C5(H5A,H5B,H5C), C13(H13A,H13B,H13C), C14(H14A,H14B,H14C),
 C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C25(H25A,H25B,H25C), C26(H26A,H26B,
 H26C), C28(H28A,H28B,H28C), C29(H29A,H29B,H29C), C31(H31A,H31B,H31C), C32(H32A,
 H32B,H32C), C33(H33A,H33B,H33C), C35(H35A,H35B,H35C), C36(H36A,H36B,H36C),
 C37(H37A,H37B,H37C), C40(H40A,H40B,H40C), C41(H41A,H41B,H41C), C42(H42A,H42B,
 H42C), C43(H43A,H43B,H43C), C48(H48A,H48B,H48C), C49(H49A,H49B,H49C), C57(H57A,
 H57B,H57C), C58(H58A,H58B,H58C), C60(H60A,H60B,H60C), C61(H61A,H61B,H61C),
 C69(H69A,H69B,H69C), C70(H70A,H70B,H70C), C72(H72A,H72B,H72C), C73(H73A,H73B,
 H73C), C75(H75A,H75B,H75C), C76(H76A,H76B,H76C), C77(H77A,H77B,H77C), C79(H79A,
 H79B,H79C), C80(H80A,H80B,H80C), C81(H81A,H81B,H81C), C84(H84A,H84B,H84C),
 C85(H85A,H85B,H85C), C86(H86A,H86B,H86C), C87(H87A,H87B,H87C)
;
_olex2_submission_special_instructions 'No special instructions were received'