European Journal Of Inorganic Chemistry 2015-08-01

On the Question of Site-Selective Ligand Exchange in Carboxylate-Substituted Metal Oxo Clusters.

Johannes Kreutzer, Matthias Czakler, Michael Puchberger, Ernst Pittenauer, Ulrich Schubert

Index: Eur. J. Inorg. Chem. 2015 , 2889-2894, (2015)

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Abstract

Reaction of [Ti4Zr4O6(OBu)4(OMc)16] (OMc = methacrylate) with acetylacetone (acacH) resulted in dissection of the cluster and formation of [Ti(OBu)2(acac)2] and the smaller cluster [Ti2Zr4O4(OMc)16]. In contrast, the same reaction with [Zr6O4(OH)4(OOCR)12]2 _6RCOOH (R = Et, CH2CH=CH2) led to site-selective substitution of two carboxylate ligands and formation of isostructural [Zr6O4(OH)4(OOCR)12-x (acac) x ]2 _6RCOOH (x 1).