Synthesis of γ-amidine-functionalized dianionic β-diketiminato lanthanide amides and trianionic β-diketiminato Na/Sm heterobimetallic complexes and their reactivity in polymerization of l-lactide.
Liu, Peng; Chen, Hongxia; Zhang, Yong; Xue, Mingqiang; Yao, Yingming; Shen, Qi; Dalton transactions (Cambridge, England : 2003) 43 (2014) 5586–5594; doi:10.1039/c3dt52706a

data_7029361
_publ_section_title
;
 Synthesis of \g-amidine-functionalized dianionic \b-diketiminato
 lanthanide amides and trianionic \b-diketiminato Na/Sm heterobimetallic
 complexes and their reactivity in polymerization of l-lactide.
;
_journal_issue                   14
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5586
_journal_page_last               5594
_journal_paper_doi               10.1039/c3dt52706a
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety         'C48 H80 N5 Si2 Yb, 0.5(C6 H14)'
_chemical_formula_sum            'C51 H87 N5 Si2 Yb'
_chemical_formula_weight         999.48
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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                99.150(2)
_cell_angle_beta                 101.425(2)
_cell_angle_gamma                92.695(2)
_cell_formula_units_Z            2
_cell_length_a                   11.4354(3)
_cell_length_b                   12.4814(3)
_cell_length_c                   19.2857(5)
_cell_measurement_reflns_used    12511
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      29.4346
_cell_measurement_theta_min      3.1490
_cell_volume                     2654.98(12)
_computing_cell_refinement       'CrysAlisPro, Agilent Technologies'
_computing_data_collection       'CrysAlisPro, Agilent Technologies'
_computing_data_reduction        'CrysAlisPro, Agilent Technologies'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_detector_area_resol_mean 10.4692
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Xcalibur, Atlas, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0625
_diffrn_reflns_av_sigmaI/netI    0.0603
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            25731
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         3.16
_exptl_absorpt_coefficient_mu    1.842
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.25144
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chip
_exptl_crystal_F_000             1052
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.60
_exptl_crystal_size_min          0.20
_refine_diff_density_max         2.144
_refine_diff_density_min         -1.142
_refine_diff_density_rms         0.104
_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     494
_refine_ls_number_reflns         9854
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0416
_refine_ls_R_factor_gt           0.0374
_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^)+(0.0418P)^2^+2.2078P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0878
_refine_ls_wR_factor_ref         0.0904
_reflns_number_gt                9090
_reflns_number_total             9854
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt52706a.txt
_cod_data_source_block           complex2
_cod_original_cell_volume        2654.97(13)
_cod_database_code               7029361