Volatile Imido−Hydrazido Compounds of the Refractory Metals Niobium, Tantalum, Molybdenum, and Tungsten
Gaess, Daniel; Harms, Klaus; Pokoj, Michael; Stolz, Wolfgang; Sundermeyer, Jörg; Inorganic Chemistry 46 (2007) 6688–6701; doi:10.1021/ic062435e

data_4333214
_publ_section_title
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 Volatile Imido&#x2212;Hydrazido Compounds of the Refractory Metals
 Niobium, Tantalum, Molybdenum, and Tungsten
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_journal_issue                   16
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6688
_journal_page_last               6701
_journal_paper_doi               10.1021/ic062435e
_journal_volume                  46
_journal_year                    2007
_chemical_formula_moiety         'C18 H49 N6 Nb1 Si2'
_chemical_formula_sum            'C18 H49 N6 Nb Si2'
_chemical_formula_weight         498.72
_chemical_name_systematic
;

 ?

;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   'C-H geom, N-H difmap'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 105.645(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.9516(12)
_cell_length_b                   30.228(3)
_cell_length_c                   10.9993(15)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     2866.0(7)
_computing_cell_refinement       'STOE CELL'
_computing_data_collection       'STOE EXPOSE'
_computing_data_reduction        'STOE INTEGRATE'
_computing_molecular_graphics    'DIAMOND 3.1'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR 92'
_diffrn_ambient_temperature      193(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'STOE IPDS'
_diffrn_measurement_method       '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  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0306
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       37
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            20488
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.95
_diffrn_reflns_theta_min         2.04
_exptl_absorpt_coefficient_mu    0.517
_exptl_absorpt_correction_T_max  0.941
_exptl_absorpt_correction_T_min  0.8902
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;

 ?

;
_exptl_crystal_colour            'colourless plate'
_exptl_crystal_density_diffrn    1.156
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1072
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.329
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.910
_refine_ls_hydrogen_treatment    'C-H noref, N-H refxyz'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     295
_refine_ls_number_reflns         5538
_refine_ls_number_restraints     55
_refine_ls_restrained_S_all      0.908
_refine_ls_R_factor_all          0.0332
_refine_ls_R_factor_gt           0.0239
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0391P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0571
_refine_ls_wR_factor_ref         0.0586
_reflns_number_gt                4407
_reflns_number_total             5538
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic062435esup1.cif
_cod_data_source_block           compound_7b
_cod_original_cell_volume        2866.0(6)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4333214