Low coordinate lanthanide(II) complexes supported by bulky guanidinato and amidinato ligands.
Heitmann, Dennis; Jones, Cameron; Mills, David P.; Stasch, Andreas; Dalton transactions (Cambridge, England : 2003) 39 (2010) 1877–1882; doi:10.1039/b924367d

data_7025012
_publ_section_title
;
 Low coordinate lanthanide(II) complexes supported by bulky guanidinato
 and amidinato ligands.
;
_journal_issue                   7
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1877
_journal_page_last               1882
_journal_paper_doi               10.1039/b924367d
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C68 H110 N6 Yb'
_chemical_formula_weight         1184.66
_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            4
_cell_length_a                   13.983(2)
_cell_length_b                   13.983(2)
_cell_length_c                   33.631(7)
_cell_measurement_temperature    150(2)
_cell_volume                     6575.7(19)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.0234
_diffrn_reflns_av_sigmaI/netI    0.0351
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            14101
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         3.16
_exptl_absorpt_coefficient_mu    1.464
_exptl_absorpt_correction_T_max  0.753
_exptl_absorpt_correction_T_min  0.701
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing, 1995)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2520
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.45
_refine_diff_density_max         0.579
_refine_diff_density_min         -0.496
_refine_diff_density_rms         0.070
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.182(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     324
_refine_ls_number_reflns         7150
_refine_ls_number_restraints     20
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0451
_refine_ls_R_factor_gt           0.0359
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0557P)^2^+1.9857P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0939
_refine_ls_wR_factor_ref         0.0985
_reflns_number_gt                6219
_reflns_number_total             7150
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b924367d.txt
_cod_data_source_block           compound8
_cod_original_cell_volume        6576.2(19)
_cod_original_sg_symbol_H-M      P4(3)2(1)2
_cod_database_code               7025012