Heteroleptic Complexes of Lanthanum(III) and Neodymium(III) with Oxygen- or Nitrogen-Functionalized Tris(triorganosilyl)methyl Ligands
Bowman, Lyndsey J.; Izod, Keith; Clegg, William; Harrington, Ross W.; Organometallics 25 (2006) 2999–; doi:10.1021/om060072k

data_4075152
_publ_section_title
;
 Heteroleptic Complexes of Lanthanum(III) and Neodymium(III) with Oxygen-
 or Nitrogen-Functionalized Tris(triorganosilyl)methyl Ligands
;
_journal_issue                   12
_journal_name_full               Organometallics
_journal_page_first              2999
_journal_paper_doi               10.1021/om060072k
_journal_volume                  25
_journal_year                    2006
_chemical_formula_moiety         'C22 H60 I La N2 Si6'
_chemical_formula_sum            'C22 H60 I La N2 Si6'
_chemical_formula_weight         787.07
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           96
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P 4nw 2abw'
_symmetry_space_group_name_H-M   'P 43 21 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   17.1751(3)
_cell_length_b                   17.1751(3)
_cell_length_c                   25.1600(7)
_cell_measurement_reflns_used    30094
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.70
_cell_measurement_theta_min      2.33
_cell_volume                     7421.8(3)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL and local programs'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.960
_diffrn_measurement_device_type  'Bruker SMART 1K CCD diffractometer'
_diffrn_measurement_method       'thin-slice \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0507
_diffrn_reflns_av_sigmaI/netI    0.0479
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            46946
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         28.96
_diffrn_reflns_theta_min         1.44
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.190
_exptl_absorpt_correction_T_max  0.669
_exptl_absorpt_correction_T_min  0.353
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.409
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3200
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.529
_refine_diff_density_min         -0.565
_refine_diff_density_rms         0.104
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.022(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.085
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     309
_refine_ls_number_reflns         9268
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0492
_refine_ls_R_factor_gt           0.0287
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0171P)^2^+2.1787P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0484
_refine_ls_wR_factor_ref         0.0544
_reflns_number_gt                7769
_reflns_number_total             9268
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om060072ksi20060308_062842.cif
_cod_data_source_block           ki183_compound3
_cod_database_code               4075152