The UV-Vis-NIR studies were carried out in the solid state at room temperature to determine the electronic states of 1•2DMF•H2O (Figure ). The electronic spectrum shows one sharp band centered at 320 nm ascribed to the ligand-to-metal charge transfer (LMCT) transition coming from the [Mo(CN)8] 3-unit. There is also a very broad charge transfer band present in the range of 600-2000 nm, which can be ascribed to the metal-to-metal charge transfer (MMCT) transition coming from the Fe II → Mo V unit. The solution state UV-Vis measurement was unable to perform due to the insolubility of this complex in any conventional organic solvents.