Unusual Equilibria Involving Group 4 Amides, Silyl Complexes, and Silyl Anions via Ligand Exchange Reactions
Xianghua Yu; Hu Cai; Ilia A. Guzei; Ziling Xue; Journal of the American Chemical Society 126 (2004) 4472–4473; doi:10.1021/ja031899y

data_4112406
_publ_section_title
;
 Unusual Equilibria Involving Group 4 Amides, Silyl Complexes, and Silyl
 Anions via Ligand Exchange Reactions
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4472
_journal_page_last               4473
_journal_paper_doi               10.1021/ja031899y
_journal_volume                  126
_journal_year                    2004
_chemical_formula_sum            'C64 H118 Li2 N8 O4 Si2 Zr2'
_chemical_formula_weight         1316.20
_chemical_name_common            Zirconium
_chemical_name_systematic
; 
Zirconium Disilyl triamdie and Zirconium pentaamide dilithium tetra THF 
;
_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                 97.789(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   25.145(3)
_cell_length_b                   17.770(3)
_cell_length_c                   16.346(3)
_cell_measurement_temperature    100(2)
_cell_volume                     7236(2)
_computing_cell_refinement       'SMART, Bruker (2000)'
_computing_data_collection       'SMART, Bruker (2000)'
_computing_data_reduction        'SHELXS-97 (Sheldrick, 1990)'
_computing_molecular_graphics    'SHELXTL, Bruker (2000)'
_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 0.965
_diffrn_measured_fraction_theta_max 0.965
_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  0.0543
_diffrn_reflns_av_sigmaI/netI    0.0555
_diffrn_reflns_limit_h_max       33
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            36482
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.41
_exptl_absorpt_coefficient_mu    0.368
_exptl_absorpt_correction_T_max  0.9136
_exptl_absorpt_correction_T_min  0.8667
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2000)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_description       fragment
_exptl_crystal_F_000             2816
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.875
_refine_diff_density_min         -0.464
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     383
_refine_ls_number_reflns         8684
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0567
_refine_ls_R_factor_gt           0.0396
_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^)+(0.0463P)^2^+10.0144P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1030
_refine_ls_wR_factor_ref         0.1169
_reflns_number_gt                6655
_reflns_number_total             8684
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja031899ysi20040217_093111.cif
_cod_data_source_block           guzeimono
_cod_database_code               4112406