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_1559326
_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         'C54 H79 N4 Nb O2 Si'
_chemical_formula_sum            'C54 H79 N4 Nb O2 Si'
_chemical_formula_weight         937.21
_chemical_melting_point          478
_chemical_name_common            (BDI)Nb(OCHNtBu)(O[SiMe2Ph])(NAr)
_chemical_name_systematic
(2,6-diisopropylphenyl)imino-(tert-butyliminomethoxy)-dimethylphenylsilanolato-(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           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2020-05-14
_audit_creation_method
;
Olex2 1.2
(compiled May 18 2018 14:05:52 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-05-14 deposited with the CCDC.	2020-10-08 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 92.431(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.629(2)
_cell_length_b                   21.336(4)
_cell_length_c                   19.715(4)
_cell_measurement_reflns_used    9972
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.32
_cell_measurement_theta_min      2.17
_cell_volume                     5307.5(17)
_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      100
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.993
_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  0.0530
_diffrn_reflns_av_unetI/netI     0.0410
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            59328
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.389
_diffrn_reflns_theta_min         1.407
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.290
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6620
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014) was used for absorption correction.
wR2(int) was 0.0556 before and 0.0471 after correction.
The Ratio of minimum to maximum transmission is 0.8884.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.173
_exptl_crystal_description       block
_exptl_crystal_F_000             2008
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: n-hexane'
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.914
_refine_diff_density_min         -0.260
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     578
_refine_ls_number_reflns         9689
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0576
_refine_ls_R_factor_gt           0.0453
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0422P)^2^+7.8592P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1023
_refine_ls_wR_factor_ref         0.1082
_reflns_Friedel_coverage         0.000
_reflns_number_gt                8048
_reflns_number_total             9689
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc03489d2.cif
_cod_data_source_block           bmkxr71
_cod_original_cell_volume        5307.4(18)
_cod_database_code               1559326
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.977
_shelx_estimated_absorpt_t_min   0.966
_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), C36(H36), C39(H39)
2.b Aromatic/amide H refined with riding coordinates:
 C2(H2), C8(H8), C9(H9), C10(H10), C20(H20), C21(H21), C22(H22), C32(H32),
 C33(H33), C34(H34), C43(H43), C44(H44), C45(H45), C46(H46), C47(H47), C50(H50)
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), C37(H37A,H37B,H37C), C38(H38A,
 H38B,H38C), C40(H40A,H40B,H40C), C41(H41A,H41B,H41C), C48(H48A,H48B,H48C),
 C49(H49A,H49B,H49C), C52(H52A,H52B,H52C), C53(H53A,H53B,H53C), C54(H54A,H54B,
 H54C)
;
_olex2_submission_special_instructions 'No special instructions were received'