| Abstract
| - The salt [K(18-crown-6)][Mn(H2O)2Cr(ox)3]·0.5(18-crown-6) (1) has been prepared and structurally and magneticallycharacterized. It crystallizes in the P21/c space group [a = 21.011(2) Å, b = 11.265(2) Å, c = 15.748(3) Å, β =105.952(6)°, V = 3584(1) Å3, and Z = 4] and contains [Mn(H2O)2Cr(ox)3]∞ chains connected through hydrogenbonding to form 2D anionic networks. The magnetic exchange is ferromagnetic [J = +2.23(2) cm-1] in the chainand also in between chains, reaching bulk ferromagnetic ordering below 3.5 K.
- The oxalate-based bimetallic ferromagnetic chain [Mn(H2O)2Cr(ox)3]nn- has been prepared using the templating cation [K(18-crown-6)]+. The chains are hydrogen bonded in the solid state, and this compound behaves as a ferromagnet below 3.5 K.
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