A μ(1,1)- or μ(1,3)-carboxylate bridge makes the difference in the magnetic properties of dinuclear Mn(II) compounds.
Gómez, Verónica; Corbella, Montserrat; Font-Bardia, Mercé; Calvet, Teresa; Dalton transactions (Cambridge, England : 2003) 39 (2010) 11664–11674; doi:10.1039/c0dt00902d

data_7026916
_publ_section_title
;
 A \m(1,1)- or \m(1,3)-carboxylate bridge makes the difference in the
 magnetic properties of dinuclear Mn(II) compounds.
;
_journal_issue                   48
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11664
_journal_page_last               11674
_journal_paper_doi               10.1039/c0dt00902d
_journal_volume                  39
_journal_year                    2010
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C64 H46 Mn2 N8 O4, 2(Cl O4)'
_chemical_formula_sum            'C64 H46 Cl2 Mn2 N8 O12'
_chemical_formula_weight         1299.87
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2009-05-22T17:39:38-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                66.425(2)
_cell_angle_beta                 88.325(2)
_cell_angle_gamma                84.093(2)
_cell_formula_units_Z            1
_cell_length_a                   9.5435(4)
_cell_length_b                   12.0805(5)
_cell_length_c                   13.3549(5)
_cell_measurement_reflns_used    1988
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.79
_cell_measurement_theta_min      2.68
_cell_measurement_wavelength     0.71073
_cell_volume                     1403.57(10)
_computing_cell_refinement       'APPEX2 (BRUKER AXS, 2005)'
_computing_data_collection       'APPEX2 (BRUKER AXS, 2005)'
_computing_data_reduction        'APPEX2 (BRUKER AXS, 2005)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-97 (Giacovazzo et all, 1999'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.972
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'BRUKER APPEX-II CCD'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0351
_diffrn_reflns_av_unetI/netI     0.0469
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            20050
_diffrn_reflns_theta_full        26.4
_diffrn_reflns_theta_max         26.4
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    0.62
_exptl_absorpt_correction_T_max  0.900
_exptl_absorpt_correction_T_min  0.814
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.538
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             666
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.311
_refine_diff_density_min         -0.439
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     462
_refine_ls_number_reflns         5596
_refine_ls_number_restraints     189
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0588
_refine_ls_R_factor_gt           0.0374
_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^)+(0.0375P)^2^+0.9626P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0838
_refine_ls_wR_factor_ref         0.0920
_reflns_number_gt                4274
_reflns_number_total             5596
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt00902d.txt
_cod_data_source_block           compound4
_cod_database_code               7026916