Magnetic Properties of Manganese(III) in Cluster-based Coordination Polymers.*

Magnetization studies, using a SQUID magnetometer operating down to 2~K and up to 7 T, were performed on one-, two-, and three-dimensional coordination polymers built with [Mn($L$)]$^+$ complexes and [Nb$_6$Cl$_{12}$(CN)$_6$]$^{4-}$ clusters. All three structures exhibited paramagnetic properties and no signs of long-range ordering down to 2 K. The magnetic properties are dominated by the Mn(III) ions, $S = 2$ and $g \approx 2$, per formula unit, and deviations between the samples at low temperatures are associated with the different anisotropic Mn(III) environments of each material.