Acta Crystallographica Section C

Crystal Structure Communications

Volume 61, Part 7 (July 2005)

metal-organic compounds


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Acta Cryst. (2005). C61, m361-m364    [doi:10.1107/S0108270105015659]

Magnetic properties of two double-layer structures built from hydroxynaphthoic acids and manganese

M. U. Schmidt, E. Alig, L. Fink, M. Bolte, R. Panisch, V. Pashchenko, B. Wolf and M. Lang

Abstract: 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([bold mu]-3-hydroxy-2-naphthoato-[bold kappa]2O: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-[bold kappa]O)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.

Formula: [Mn(C11H7O3)2(H2O)2] and [Mn(C11H7O3)2(H2O)4]

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