New high-nuclearity manganese clusters containing mixed chelating ligands: Syntheses, crystal structures and magnetochemical characterizationElectronic supplementary information (ESI) available: Experimental details and additional figures (Fig. S1–S4). CCDC reference numbers 781825–781826. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c0dt01588a

Two polynuclear mixed-valence manganese clusters, [Mn13] and [Mn16], containing mixed chelating ligands were synthesized and structurally characterized. The alternating current (AC) susceptibilities of both complexes reveal nonzero frequency-dependent out-of-phase (χM′′) signals. [ABSTRACT FROM AUTHOR]