An extended open framework based on disordered [Nb6Cl9O3(CN)6]5− cluster units: Synthesis and crystal structure of Cs3Mn[Nb6Cl9O3(CN)6]⋠0.6H2O

The synthesis and crystal structure of Cs3Mn[Nb6Cl9O3(CN)6]⋅0.6H2O are described in this work. It crystallizes in the cubic system (space group Fm-3m; a=15.708(5)Å) and is characterized by a static orientational disorder of the [Nb6Cl9O3(CN)6]5− cluster units. It results in a Mn{Nb6Cl9O3(CN)6}]3−∞ framework structurally related to that encountered in the well known Prussian Blue family prepared for different hexacyanometallates. The charge of the [Mn{Nb6Cl9O3(CN)6}]3−∞ framework is compensated by cesium cations that are located in the tetrahedral cavities of the c.f.c. lattice of units along with water molecules. We will evidence the features that act in the crystallization of solid state compounds built up from ordered or disordered units as well as the influence of orientational disorder on interatomic distances obtained from single-crystal X-ray diffraction investigations.