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_7026918
_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_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           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                 96.48(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   14.975(8)
_cell_length_b                   20.112(6)
_cell_length_c                   9.582(5)
_cell_measurement_reflns_used    987
_cell_measurement_temperature    248(2)
_cell_measurement_theta_max      2.61
_cell_measurement_theta_min      32.33
_cell_volume                     2867(2)
_computing_cell_refinement       AUTOMAR
_computing_data_collection       MARXDS
_computing_data_reduction        MARSCALE
_computing_molecular_graphics    'ORTEP (Brueggermann and Smith, 1990)'
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      248(2)
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.900
_diffrn_measurement_device_type  'MAR345 with image plate detector'
_diffrn_measurement_method       'phi scan'
_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  0.0763
_diffrn_reflns_av_sigmaI/netI    0.0544
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            15537
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         32.33
_diffrn_reflns_theta_min         2.61
_exptl_absorpt_coefficient_mu    0.607
_exptl_absorpt_correction_T_max  0.94
_exptl_absorpt_correction_T_min  0.93
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.506
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1332
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.441
_refine_diff_density_min         -0.320
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     233
_refine_ls_number_reflns         4730
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.099
_refine_ls_R_factor_all          0.1129
_refine_ls_R_factor_gt           0.0625
_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^)+(0.0769P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1512
_refine_ls_wR_factor_ref         0.1709
_reflns_number_gt                3046
_reflns_number_total             4730
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00902d.txt
_cod_data_source_block           compound6
_cod_original_sg_symbol_Hall     -C2y
_cod_original_sg_symbol_H-M      C2/m
_cod_database_code               7026918