X-ray single-crystal structure and magnetic properties of KMn(H2O)5Ru2(CO3)4.5H2O: A layered soft magnet.

Abstract: The temperature manipulation induces the aggregation of Ru2(CO3)4 3− paddle-wheel precursors and Mn2+ ions in lower temperature ~10°C forming layer structural complex, K[Mn(H2O)4Ru2(CO3)4]·5H2O (1). It composes of new negative layer {Mn(H2O)5Ru2(CO3)4} n n−, and magnetic exchanges between spin centers result in ordering below 3.8K. The observed critical temperature is like the previously reported 3D hetero-metallic carbonates H0.3K0.7Mn[Ru2(CO3)4](H2O)5.5, which demonstrates that it is independent of the interlayer connecting in such heterometallic complexes based on square-grid layer {Ru2(CO3)4} n 3n−. [Copyright &y& Elsevier]