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_1559325
_publ_section_title
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 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         'C84 H116 N6 Nb2 O6, 2(C6 H18 O Si2)'
_chemical_formula_sum            'C96 H152 N6 Nb2 O8 Si4'
_chemical_formula_weight         908.20
_chemical_melting_point          444
_chemical_name_common            '[(BDI)Nb(NAr)(\m-CO3)]2'
_chemical_name_systematic
'bis(\m2-carbonato-O,O?:O??)-bis(2,6-diisopropylphenyl)imino-bis(N,N?-bis(2,6-diisopropylphenyl)-3,5-dimethyl-B-diketiminato)-diniobium(V) hexamethydisiloxane solvate'
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2020-05-13
_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                76.581(4)
_cell_angle_beta                 81.666(4)
_cell_angle_gamma                83.559(4)
_cell_formula_units_Z            2
_cell_length_a                   13.3294(12)
_cell_length_b                   15.6578(14)
_cell_length_c                   24.934(2)
_cell_measurement_reflns_used    9087
_cell_measurement_temperature    100
_cell_measurement_theta_max      25.44
_cell_measurement_theta_min      2.25
_cell_volume                     4991.7(8)
_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 1.000
_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  0.1465
_diffrn_reflns_av_unetI/netI     0.0994
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            85465
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.499
_diffrn_reflns_theta_min         1.341
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.332
_exptl_absorpt_correction_T_max  0.7452
_exptl_absorpt_correction_T_min  0.6683
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014) was used for absorption correction.
wR2(int) was 0.1279 before and 0.0678 after correction.
The Ratio of minimum to maximum transmission is 0.8968.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            red
_exptl_crystal_colour_primary    red
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_description       block
_exptl_crystal_F_000             1944
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.1
_refine_diff_density_max         1.737
_refine_diff_density_min         -1.012
_refine_diff_density_rms         0.105
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1079
_refine_ls_number_reflns         18437
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0849
_refine_ls_R_factor_gt           0.0603
_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^)+(0.0950P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1587
_refine_ls_wR_factor_ref         0.1698
_reflns_Friedel_coverage         0.000
_reflns_number_gt                12832
_reflns_number_total             18437
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc03489d2.cif
_cod_data_source_block           bmkxr68
_cod_depositor_comments
;

2022-06-21
Z value fixed to be consistent with given formula
                 miguel
;
_cod_original_formula_units_Z            4
_cod_database_code               1559325
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.968
_shelx_estimated_absorpt_t_min   0.955
_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. Uiso/Uaniso restraints and constraints
Uanis(C42) = Uanis(O3)
3.a Ternary CH refined with riding coordinates:
 C12(H12), C15(H15), C24(H24), C27(H27), C36(H36), C39(H39), C54(H54),
 C57(H57), C66(H66), C69(H69), C78(H78), C81(H81)
3.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), C44(H44), C50(H50), C51(H51), C52(H52), C62(H62), C63(H63),
  C64(H64), C74(H74), C75(H75), C76(H76)
3.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), C46(H46A,H46B,H46C),
 C47(H47A,H47B,H47C), C55(H55A,H55B,H55C), C56(H56A,H56B,H56C), C58(H58A,H58B,
 H58C), C59(H59A,H59B,H59C), C67(H67A,H67B,H67C), C68(H68A,H68B,H68C), C70(H70A,
 H70B,H70C), C71(H71A,H71B,H71C), C79(H79A,H79B,H79C), C80(H80A,H80B,H80C),
 C82(H82A,H82B,H82C), C83(H83A,H83B,H83C), C85(H85A,H85B,H85C), C86(H86A,H86B,
 H86C), C87(H87A,H87B,H87C), C88(H88A,H88B,H88C), C89(H89A,H89B,H89C), C90(H90A,
 H90B,H90C), C91(H91A,H91B,H91C), C92(H92A,H92B,H92C), C93(H93A,H93B,H93C),
 C94(H94A,H94B,H94C), C95(H95A,H95B,H95C), C96(H96A,H96B,H96C)
;