Rare nuclearities, new structural motifs, and slow magnetization relaxation phenomena in manganese cluster chemistry: A Mn15Na2 cage from the use of triethanolamine/pivalate/azide “blend”.

Abstract: The combination of azide, carboxylate (pivalate and in situ generated formate) and triethanolamine ligands in higher oxidation state Mn cluster chemistry has afforded a new pentadecanuclear, mixed-valence(II,III) compound with a large S and a negative D value. The unprecedented [MnII 2MnIII 13] cluster exhibits frequency-dependent out-of-phase (χ M″) signals, characteristics of the superparamagnetic-like slow relaxation of an SMM. [Copyright &y& Elsevier]