Heterometallic 20-membered {Fe16Ln4} (Ln = Sm, Eu, Gd, Tb, Dy, Ho) metallo-ring aggregates.
Baniodeh, Amer; Hewitt, Ian J.; Mereacre, Valeriu; Lan, Yanhua; Novitchi, Ghenadie; Anson, Christopher E.; Powell, Annie K.; Dalton transactions (Cambridge, England : 2003) 40 (2011) 4080–4086; doi:10.1039/c0dt01742f

data_7015579
_publ_section_title
;
 Heterometallic 20-membered {Fe16Ln4} (Ln = Sm, Eu, Gd, Tb, Dy, Ho)
 metallo-ring aggregates.
;
_journal_issue                   16
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4080
_journal_page_last               4086
_journal_paper_doi               10.1039/c0dt01742f
_journal_volume                  40
_journal_year                    2011
_chemical_formula_moiety
'C136 H276 Eu4 Fe16 N20 O76, 4(N O3), 11(C2 H3 N), 16(H2 O) '
_chemical_formula_sum            'C158 H341 Eu4 Fe16 N35 O104'
_chemical_formula_weight         5897.10
_chemical_name_systematic
;
?
;
_space_group_IT_number           68
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-C 2a 2ac'
_symmetry_space_group_name_H-M   'C c c a :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                   27.7369(19)
_cell_length_b                   28.1589(19)
_cell_length_c                   30.573(2)
_cell_measurement_reflns_used    11623
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.72
_cell_measurement_theta_min      2.17
_cell_volume                     23879(3)
_computing_cell_refinement       'SMART-NT 5.6 (Bruker AXS Inc., 2005)'
_computing_data_collection       'SMART-NT 5.6 (Bruker AXS Inc., 2005)'
_computing_data_reduction        'SAINT+ 6.45 (Bruker AXS Inc., 2003)'
_computing_molecular_graphics    'Diamond 2.1 (Crystal Impact, 1998)'
_computing_publication_material  'SHELXTL 6.14 (BrukerAXS Inc., 2003)'
_computing_structure_refinement  'SHELXTL 6.14 (BrukerAXS Inc., 2003)'
_computing_structure_solution    'SHELXTL 6.14 (BrukerAXS Inc., 2003)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART Apex'
_diffrn_measurement_method       'CCD area detector'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0506
_diffrn_reflns_av_sigmaI/netI    0.0296
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            84676
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         2.17
_exptl_absorpt_coefficient_mu    2.069
_exptl_absorpt_correction_T_max  0.682
_exptl_absorpt_correction_T_min  0.542
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2.10 (Bruker AXS Inc., 2005)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.640
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             12136
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.581
_refine_diff_density_min         -0.746
_refine_diff_density_rms         0.129
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.201
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     724
_refine_ls_number_reflns         12669
_refine_ls_number_restraints     104
_refine_ls_restrained_S_all      1.220
_refine_ls_R_factor_all          0.0628
_refine_ls_R_factor_gt           0.0496
_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^)+(0.0956P)^2^+17.5123P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1500
_refine_ls_wR_factor_ref         0.1586
_reflns_number_gt                10454
_reflns_number_total             12669
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt01742f.txt
_cod_data_source_block           amac16eu
_cod_original_sg_symbol_Hall     '-C 2b 2bc'
_cod_original_sg_symbol_H-M      'C c c a'
_cod_database_code               7015579