Deprotonation Reactions of Zirconium and Hafnium Amide Complexes H2N-M[N(SiMe3)2]3 and Subsequent Silyl Migration from Amide -N(SiMe3)2 to Imide NH Ligands
Xianghua Yu; Zi-Ling Xue; Inorganic Chemistry 44 (2005) 1505–1510; doi:10.1021/ic0485413

data_4308686
_publ_contact_author_name        'Zi-Ling Xue'
_publ_section_title
;
Deprotonation Reactions of Zirconium and Hafnium Amide Complexes
H2N-M[N(SiMe3)2]3 and Subsequent Silyl Migration from Amide -N(SiMe3)2 to
Imide NH Ligands
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1505
_journal_page_last               1510
_journal_paper_doi               10.1021/ic0485413
_journal_volume                  44
_journal_year                    2005
_chemical_formula_sum            'C26 H71 Li N4 O2 Si6 Zr'
_chemical_formula_weight         738.57
_chemical_name_common            zirconium
_chemical_name_systematic
; 
Zirconium Trimethylsilylamide lithium THF
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                84.513(7)
_cell_angle_beta                 85.172(8)
_cell_angle_gamma                62.462(7)
_cell_formula_units_Z            4
_cell_length_a                   11.666(5)
_cell_length_b                   12.283(5)
_cell_length_c                   33.923(15)
_cell_measurement_temperature    173(2)
_cell_volume                     4286(3)
_computing_cell_refinement       'SMART, Bruker (2000)'
_computing_data_collection       'SMART, Bruker (2000)'
_computing_data_reduction        'SHELXS-97 (Sheldrick, 1990)'
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL, Bruker (2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.938
_diffrn_measured_fraction_theta_max 0.938
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       Multi-scan
_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  0.0361
_diffrn_reflns_av_sigmaI/netI    0.0481
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       44
_diffrn_reflns_limit_l_min       -44
_diffrn_reflns_number            46598
_diffrn_reflns_theta_full        28.33
_diffrn_reflns_theta_max         28.33
_diffrn_reflns_theta_min         1.21
_exptl_absorpt_coefficient_mu    0.450
_exptl_absorpt_correction_T_max  0.9564
_exptl_absorpt_correction_T_min  0.8695
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2000)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.145
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       flake
_exptl_crystal_F_000             1592
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.950
_refine_diff_density_min         -0.686
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.836
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     763
_refine_ls_number_reflns         20081
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.836
_refine_ls_R_factor_all          0.0619
_refine_ls_R_factor_gt           0.0424
_refine_ls_shift/su_max          4.401
_refine_ls_shift/su_mean         0.021
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1007P)^2^+8.9745P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1169
_refine_ls_wR_factor_ref         0.1492
_reflns_number_gt                15587
_reflns_number_total             20081
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic0485413rom20041019_121820.cif
_cod_data_source_block           yu17
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_database_code               4308686