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_7026914
_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(C2 H6 O), 2(Cl O4)'
_chemical_formula_sum            'C68 H58 Cl2 Mn2 N8 O14'
_chemical_formula_weight         1392.00
_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
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_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                111.089(2)
_cell_angle_beta                 95.032(2)
_cell_angle_gamma                102.951(2)
_cell_formula_units_Z            1
_cell_length_a                   9.4995(3)
_cell_length_b                   13.1136(4)
_cell_length_c                   14.1160(4)
_cell_measurement_reflns_used    1944
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      24.43
_cell_measurement_theta_min      2.74
_cell_measurement_wavelength     0.71073
_cell_volume                     1571.31(9)
_computing_cell_refinement       'Bruker APEX II'
_computing_data_collection       'Bruker APEX II'
_computing_data_reduction        'Bruker APEX II'
_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    'SIR97 (Giacovazzo et al, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'BrukerAXS ApexII-CCD area detector '
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0363
_diffrn_reflns_av_unetI/netI     0.0259
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            42683
_diffrn_reflns_theta_full        25.68
_diffrn_reflns_theta_max         25.68
_diffrn_reflns_theta_min         1.57
_exptl_absorpt_coefficient_mu    0.562
_exptl_absorpt_correction_T_max  0.9
_exptl_absorpt_correction_T_min  0.84222
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.471
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             718
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.487
_refine_diff_density_min         -0.82
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     436
_refine_ls_number_reflns         5947
_refine_ls_number_restraints     4
_refine_ls_restrained_S_all      1.103
_refine_ls_R_factor_all          0.0396
_refine_ls_R_factor_gt           0.0326
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0379P)^2^+0.7148P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0788
_refine_ls_wR_factor_ref         0.0817
_reflns_number_gt                5101
_reflns_number_total             5947
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00902d.txt
_cod_data_source_block           compound2
_cod_database_code               7026914