Synthesis and Single-Crystal X-ray Diffraction Examination of a Structurally Homologous Series of Tetracoordinate Heteroleptic Anionic Lanthanide Complexes: Ln{N[Si(CH3)2CH2CH2Si(CH3)2]}3(μ-Cl)Li(L)3 [Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb; (L)3= (THF)3, (Et2O)3, (THF)2(Et2O)]
Oliver Just; William S. Rees; Inorganic Chemistry 40 (2001) 1751–1755; doi:10.1021/ic9912023

data_4319520
_publ_section_title
;
 Synthesis and Single-Crystal X-ray Diffraction Examination of a
 Structurally Homologous Series of Tetracoordinate Heteroleptic Anionic
 Lanthanide Complexes: Ln{N[Si(CH3)2CH2CH2Si(CH3)2]}3(\m-Cl)Li(L)3 [Ln =
 Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb; (L)3= (THF)3, (Et2O)3, (THF)2(Et2O)]
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              1751
_journal_page_last               1755
_journal_paper_doi               10.1021/ic9912023
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'C30 H74 Cl Gd Li N3 O3 Si6'
_chemical_formula_weight         893.10
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.5270(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.4536(3)
_cell_length_b                   21.7727(5)
_cell_length_c                   19.7242(5)
_cell_measurement_temperature    173(2)
_cell_volume                     4801.6(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.918
_diffrn_measured_fraction_theta_max 0.918
_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  0.0472
_diffrn_reflns_av_sigmaI/netI    0.0709
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            29982
_diffrn_reflns_theta_full        28.49
_diffrn_reflns_theta_max         28.49
_diffrn_reflns_theta_min         1.41
_exptl_absorpt_coefficient_mu    1.615
_exptl_crystal_density_diffrn    1.235
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1868
_refine_diff_density_max         0.570
_refine_diff_density_min         -0.588
_refine_diff_density_rms         0.088
_refine_ls_extinction_coef       0.00051(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.960
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     441
_refine_ls_number_reflns         11171
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.960
_refine_ls_R_factor_all          0.0779
_refine_ls_R_factor_gt           0.0368
_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^)+(0.0328P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0661
_refine_ls_wR_factor_ref         0.0768
_reflns_number_gt                7438
_reflns_number_total             11171
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic9912023_3.cif
_cod_data_source_block           just3
_cod_database_code               4319520