Co-Ln Mixed-Metal Phosphonate Grids and Cages as Molecular Magnetic Refrigerants
Yan-Zhen Zheng; Marco Evangelisti; Floriana Tuna; Richard E. P. Winpenny; Journal of the American Chemical Society 134 (2012) 1057–1065; doi:10.1021/ja208367k

data_4117283
_publ_section_title
;
 Co-Ln Mixed-Metal Phosphonate Grids and Cages as Molecular Magnetic
 Refrigerants
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              1057
_journal_page_last               1065
_journal_paper_doi               10.1021/ja208367k
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C112 H222 Co8 N4 O73 P8 Yb8'
_chemical_formula_weight         4896.46
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_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                 101.6380(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   35.3738(17)
_cell_length_b                   20.4284(9)
_cell_length_c                   24.9837(12)
_cell_measurement_temperature    100(2)
_cell_volume                     17682.8(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0598
_diffrn_reflns_av_sigmaI/netI    0.0494
_diffrn_reflns_limit_h_max       42
_diffrn_reflns_limit_h_min       -42
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            59954
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.49
_exptl_absorpt_coefficient_mu    5.068
_exptl_absorpt_correction_T_max  0.5169
_exptl_absorpt_correction_T_min  0.1100
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.839
_exptl_crystal_description       needle
_exptl_crystal_F_000             9608
_exptl_crystal_size_max          0.78
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         2.763
_refine_diff_density_min         -2.142
_refine_diff_density_rms         0.182
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.044
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1330
_refine_ls_number_reflns         15513
_refine_ls_number_restraints     2293
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.1061
_refine_ls_R_factor_gt           0.0749
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0803P)^2^+475.0915P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1789
_refine_ls_wR_factor_ref         0.2031
_reflns_number_gt                10957
_reflns_number_total             15513
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja208367k_si_016.cif
_cod_data_source_block           coybm
_cod_database_code               4117283