Mixed hydrazido amido/imido complexes of tantalum, hafnium and zirconium: potential precursors for metal nitride MOCVD.
Baunemann, Arne; Kim, Younsoo; Winter, Manuela; Fischer, Roland A.; Dalton transactions (Cambridge, England : 2003)  (2006) 121–128; doi:10.1039/b512074h

data_7006582
_publ_section_title
;
 Mixed hydrazido amido/imido complexes of tantalum, hafnium and
 zirconium: potential precursors for metal nitride MOCVD.
;
_journal_issue                   1
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              121
_journal_page_last               128
_journal_paper_doi               10.1039/b512074h
_journal_year                    2006
_chemical_formula_sum            'C20 H40 Li2 N6 Si2'
_chemical_formula_weight         434.64
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 105.113(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   9.063(4)
_cell_length_b                   19.277(8)
_cell_length_c                   8.088(3)
_cell_measurement_reflns_used    150
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      20.0
_cell_measurement_theta_min      5.0
_cell_volume                     1364.2(10)
_computing_cell_refinement       SMART
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_molecular_graphics    'Bruker axs SHELXTL-PLUS'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker axs ccd1000'
_diffrn_measurement_method       '\w 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  0.0617
_diffrn_reflns_av_sigmaI/netI    0.0744
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            7796
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         2.33
_exptl_absorpt_coefficient_mu    0.146
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.058
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             472
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.447
_refine_diff_density_min         -0.312
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         2408
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.1023
_refine_ls_R_factor_gt           0.0545
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w==1/[\s^2^(Fo^2^)+(0.0600P)^2^+0.0000P] where P==(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1226
_refine_ls_wR_factor_ref         0.1404
_reflns_number_gt                1426
_reflns_number_total             2408
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b512074h.txt
_cod_data_source_block           raf73a
_cod_original_cell_volume        1364.0(10)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7006582