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_4117274
_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            'C66 H116 Co4 Gd2 N4 O26 P2'
_chemical_formula_weight         1993.79
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 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                 116.9110(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   21.4188(10)
_cell_length_b                   17.1961(10)
_cell_length_c                   14.1214(8)
_cell_measurement_temperature    100(2)
_cell_volume                     4638.0(4)
_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      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0310
_diffrn_reflns_av_sigmaI/netI    0.0268
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            18168
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.01
_exptl_absorpt_coefficient_mu    2.209
_exptl_absorpt_correction_T_max  0.5768
_exptl_absorpt_correction_T_min  0.4365
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.428
_exptl_crystal_description       block
_exptl_crystal_F_000             2028
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.28
_refine_diff_density_max         2.990
_refine_diff_density_min         -2.769
_refine_diff_density_rms         0.130
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     266
_refine_ls_number_reflns         4719
_refine_ls_number_restraints     142
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0511
_refine_ls_R_factor_gt           0.0473
_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^)+(0.0527P)^2^+46.5403P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1164
_refine_ls_wR_factor_ref         0.1192
_reflns_number_gt                4342
_reflns_number_total             4719
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja208367k_si_007.cif
_cod_data_source_block           c
_cod_database_code               4117274