EPR and magnetic quantum tunneling studies of the mixed valent [Mn4(anca)4(Hedea)2(edea)2]·2CHCl3, EtOH single-molecule magnet

► High-frequency Electron Magnetic Resonance and Quantum Tunneling of Magnetization measurements on Mn4 dicubane single-molecule magnet. ► Large spin ground state with low lying excited spin states. ► EPR spectra and QTM measurements provide insights regarding the physics in weak coupled molecule.