Abstract
This work presents for the first time a systematic investigation on the thermal decomposition and thermal stability of ten representative triruthenium clusters of general formula [Ru3(μ3-O)(μ-Ac)6(L)2L′]n (Ac = CH3COO− and L = N-heterocycles or H2O; L′ = py, Ac, H2O, CO or NO; n = 1+ or 0). Despite the variation of the N-heterocyclic L ligands, the pyridyl, nitrosyl and carbonyl species are quite similar in terms of their thermal decomposition path. The loosely bound solvent molecules are lost first, followed by the loss of the N-heterocyclic ligands, with the final collapse of the metallic core upon acetates oxidation in the range from 270 to 300 °C. Their thermal stability depends on the nature of the L and L′ ligands, varying up to 60°depending on the presence of NO, CO or N-heterocyclic ligands.
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