The characterization of two new single-molecule magnets,[Mn12O12(O2CCH2C6H5H5)16(H2O)4] (7) and [Mn12O12(O2CCH2But)16(H2O)4] (8) is reported here. Even though the two complexes have the same isomeric arrangement of H2O ligands the ac magnetic susceptibility responses are different for the two complexes. Complex 7 shows an out-of-phase (XM′) peak in the 4–7 K region, whereas complex 8 shows a XM′ peak in the 2–4 K region. The influence of solvate molecules upon the magnetization relaxation rates of these Mn12 complexes is studied.
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Ruiz et al. (1999) studied this question.
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