Niobaziridine Hydrides†
Figueroa, Joshua S.; Piro, Nicholas A.; Mindiola, Daniel J.; Fickes, Michael G.; Cummins, Christopher C.; Organometallics 29 (2010) 5215–; doi:10.1021/om100522p

data_4066567
_publ_section_title
;
 Niobaziridine Hydrides&#x2020;
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              5215
_journal_paper_doi               10.1021/om100522p
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C42 H65 N3 Nb O1.5'
_chemical_formula_weight         728.88
_chemical_name_common            Nb(OC(H)=C(H)tBu)(NAr)(N[Np]Ar)2
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 115.2360(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   38.352(2)
_cell_length_b                   11.8010(7)
_cell_length_c                   20.3400(13)
_cell_measurement_reflns_used    16428
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      23.28
_cell_measurement_theta_min      2.26
_cell_volume                     8327.1(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0838
_diffrn_reflns_av_sigmaI/netI    0.0600
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -42
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            16428
_diffrn_reflns_theta_full        23.28
_diffrn_reflns_theta_max         23.28
_diffrn_reflns_theta_min         2.26
_exptl_absorpt_coefficient_mu    0.323
_exptl_absorpt_correction_T_max  0.9840
_exptl_absorpt_correction_T_min  0.9382
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.163
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             3128
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.05
_platon_squeeze_details
;
The structure contained a severely disordered molecule of Et2O which 
was treated with SQUEEZE. A 758.1 Ang^3^ void space contained 75 electrons,
corresponding to roughly 2 molecules of Et2O per cell.
;
_refine_diff_density_max         0.614
_refine_diff_density_min         -0.460
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     406
_refine_ls_number_reflns         5981
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0559
_refine_ls_R_factor_gt           0.0467
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0754P)^2^+7.8836P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1264
_refine_ls_wR_factor_ref         0.1322
_reflns_number_gt                4969
_reflns_number_total             5981
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om100522p_si_002.cif
_cod_data_source_block           002178m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        8327.1(9)
_cod_original_sg_symbol_H-M      C2/c
_cod_original_formula_sum        'C42 H65 N3 Nb O1.50'
_cod_database_code               4066567