Synthesis and characterization of amine bridged bis(phenolate) lanthanide aryloxides and their application in the polymerization of lactide.
Nie, Kun; Gu, Xiangyong; Yao, Yingming; Zhang, Yong; Shen, Qi; Dalton transactions (Cambridge, England : 2003) 39 (2010) 6832–6840; doi:10.1039/c001888k

data_7025581
_publ_section_title
;
 Synthesis and characterization of amine bridged bis(phenolate) lanthanide
 aryloxides and their application in the polymerization of lactide.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6832
_journal_page_last               6840
_journal_paper_doi               10.1039/c001888k
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C50 H79 N2 O4 Sm'
_chemical_formula_sum            'C50 H79 N2 O4 Sm'
_chemical_formula_weight         922.50
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   15.3534(14)
_cell_length_b                   16.8680(15)
_cell_length_c                   19.187(2)
_cell_measurement_reflns_used    12813
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.1
_cell_volume                     4969.1(8)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalStructure
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_detector_area_resol_mean 14.63
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Rigaku Saturn'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0930
_diffrn_reflns_av_sigmaI/netI    0.1650
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            16070
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         3.10
_exptl_absorpt_coefficient_mu    1.223
_exptl_absorpt_correction_T_max  0.788
_exptl_absorpt_correction_T_min  0.460
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.233
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1948
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         2.391
_refine_diff_density_min         -1.202
_refine_diff_density_rms         0.180
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.05(4)
_refine_ls_extinction_coef       0.0186(15)
_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   1.091
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     454
_refine_ls_number_reflns         8999
_refine_ls_number_restraints     14
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.1219
_refine_ls_R_factor_gt           0.1032
_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^)+(0.1290P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2604
_refine_ls_wR_factor_ref         0.2768
_reflns_number_gt                6447
_reflns_number_total             8999
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c001888k.txt
_cod_data_source_block           complex2
_cod_original_cell_volume        4968.9(8)
_cod_database_code               7025581