Single-Molecule-Magnet Behavior in a Fe12Sm4 Cluster
Yong-Fei Zeng; Guan-Cheng Xu; Xin Hu; Zhuo Chen; Xian-He Bu; Song Gao; E. C. Sañudo; Inorganic Chemistry 49 (2010) 9734–9736; doi:10.1021/ic1009708

data_4316917
_publ_section_title
;
 Single-Molecule-Magnet Behavior in a Fe12Sm4 Cluster
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              9734
_journal_page_last               9736
_journal_paper_doi               10.1021/ic1009708
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'C168 H124 Fe12 Gd4 N0 O62'
_chemical_formula_weight         4433.87
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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                61.22(3)
_cell_angle_beta                 60.85(3)
_cell_angle_gamma                71.20(3)
_cell_formula_units_Z            1
_cell_length_a                   17.614(4)
_cell_length_b                   17.925(4)
_cell_length_c                   18.627(4)
_cell_measurement_reflns_used    27047
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.2
_cell_measurement_theta_min      3.1
_cell_volume                     4472(2)
_computing_cell_refinement       'Bruker XSCANS'
_computing_data_collection       'Bruker XSCANS'
_computing_data_reduction        'Bruker SHELXTL'
_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      293(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  scx-mini
_diffrn_measurement_method       '\w scan'
_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  0.2061
_diffrn_reflns_av_sigmaI/netI    0.3022
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            37232
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         3.15
_exptl_absorpt_coefficient_mu    2.484
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            ORANGE
_exptl_crystal_density_diffrn    1.646
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             2196
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_platon_squeeze_details          ' ?'
_refine_diff_density_max         1.003
_refine_diff_density_min         -1.013
_refine_diff_density_rms         0.196
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.994
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1135
_refine_ls_number_reflns         15664
_refine_ls_number_restraints     1264
_refine_ls_restrained_S_all      0.964
_refine_ls_R_factor_all          0.2341
_refine_ls_R_factor_gt           0.1079
_refine_ls_shift/su_max          0.505
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0600P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1747
_refine_ls_wR_factor_ref         0.2169
_reflns_number_gt                6746
_reflns_number_total             15664
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic1009708_si_002_6.cif
_cod_data_source_block           3.squeezed
_cod_original_cell_volume        4472.1(15)
_cod_database_code               4316917