Heptanuclear Heterometallic [Cu6Ln] Clusters: Trapping Lanthanides into Copper Cages with Artificial Amino Acids
George J. Sopasis; Angelos B. Canaj; Aggelos Philippidis; Milosz Siczek; Tadeusz Lis; James R. O'Brien; Manolis M. Antonakis; Spiros A. Pergantis; Constantinos J. Milios; Inorganic Chemistry 51 (2012) 5911–5918; doi:10.1021/ic300538q

data_4329278
_publ_section_title
;
 Heptanuclear Heterometallic [Cu6Ln] Clusters: Trapping Lanthanides into
 Copper Cages with Artificial Amino Acids
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5911
_journal_page_last               5918
_journal_paper_doi               10.1021/ic300538q
_journal_volume                  51
_journal_year                    2012
_chemical_formula_moiety
'C30 H60 Cu6 N9 O30 Er , 1.5(C4 H10 O), 6.75(C H4 O), 0.1 (H2 O)'
_chemical_formula_sum            'C42.75 H102.2 Cu6 Er N9 O38.35'
_chemical_formula_weight         1904.64
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           176
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-P 6c'
_symmetry_space_group_name_H-M   'P 63/m'
_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                120.00
_cell_formula_units_Z            2
_cell_length_a                   19.955(4)
_cell_length_b                   19.955(4)
_cell_length_c                   13.273(3)
_cell_measurement_reflns_used    23257
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      35.12
_cell_measurement_theta_min      3.07
_cell_volume                     4577.2(17)
_computing_cell_refinement       'CrysAlis CCD, Oxford Diffraction Ltd.'
_computing_data_collection       'CrysAlis RED, Oxford Diffraction Ltd.'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd.'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  KM4CCD
_diffrn_measurement_method       \w
_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  0.0663
_diffrn_reflns_av_sigmaI/netI    0.0543
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            65078
_diffrn_reflns_theta_full        26.50
_diffrn_reflns_theta_max         35.12
_diffrn_reflns_theta_min         3.07
_exptl_absorpt_coefficient_mu    2.349
_exptl_absorpt_correction_T_max  0.778
_exptl_absorpt_correction_T_min  0.508
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.5
Analytical numeric absorption correction using a 
multifaceted crystal model based on expressions
 derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.382
_exptl_crystal_description       block
_exptl_crystal_F_000             1941
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         3.190
_refine_diff_density_min         -1.725
_refine_diff_density_rms         0.144
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.114
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     197
_refine_ls_number_reflns         7005
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.115
_refine_ls_R_factor_all          0.0945
_refine_ls_R_factor_gt           0.0598
_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^)+(0.0519P)^2^+13.0065P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1369
_refine_ls_wR_factor_ref         0.1479
_reflns_number_gt                5003
_reflns_number_total             7005
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic300538q_si_001_10.cif
_cod_data_source_block           gis675a
_cod_original_formula_sum        'C42.75 H102.20 Cu6 Er N9 O38.35'
_cod_database_code               4329278