Magnetic properties of two double-layer structures built from hydroxynaphthoic acids and manganese.
Double-layer structures consisting of alternating polar and non-polar layers have been prepared using Mn2+ ions and o-hydroxynaphthoic acids. The polar layers contain the Mn2+ ions, carboxylate groups, hydroxy groups and water molecules. The non-polar layers are built up from the naphthalene moieties. In catena-poly[[diaquamanganese(II)]bis(mu-3-hydroxy-2-naphthoato-kappa2O:O')] (also called manganese 3-hydroxy-2-naphthoate dihydrate), [Mn(C11H7O3)2(H2O)2]n, (I), the Mn2+ ions are connected by carboxylate groups to form two-dimensional networks. This compound shows distinct antiferromagnetic interactions and long-range ordering at low temperature. In contrast, tetraaquabis(1-hydroxy-2-naphthoato-kappaO)manganese(II), [Mn(C11H7O3)2(H2O)4], (II), which lacks a close linkage between the Mn2+ ions, reveals purely paramagnetic behaviour. In (II), the Mn2+ ion lies on an inversion centre.
Schmidt
Martin U
MU
Institut für Anorganische und Analytische Chemie, J. W. Goethe-Universität Frankfurt, FOR 412, Marie-Curie-Strasse 11, 60439 Frankfurt am Main, Germany.
Alig
Edith
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Fink
Lothar
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Bolte
Michael
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Panisch
Robin
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Pashchenko
Volodymyr
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Wolf
Bernd
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Lang
Michael
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