Configurational Isomerism in Polyoxovanadates |
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| Authors: | M Sc Lisa K Mahnke Dr Aleksandar Kondinski M Sc Ulrike Warzok Prof Dr Christian Näther Dr Jan van Leusen Prof Dr Christoph A Schalley Dr Kirill Yu Monakhov Prof Dr Paul Kögerler Prof Dr Wolfgang Bensch |
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| Institution: | 1. Institut für Anorganische Chemie, Christian-Albrechts-Universit?t zu Kiel, Kiel, Germany;2. Institut für Anorganische Chemie, RWTH Aachen University, Aachen, Germany;3. Current address: Department of Chemistry, KU Leuven, Leuven, Belgium;4. Institut für Chemie und Biochemie, Freie Universit?t Berlin, Berlin, Germany |
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| Abstract: | A water‐soluble derivative of the polyoxovanadate {V15E6O42} (E=semimetal) archetype enables the study of cluster shell rearrangements driven by supramolecular interactions. A reaction unique to E=Sb, induced exclusively by ligand metathesis in peripheral Ni(ethylenediamine)3]2+ counterions, results in the formation of the metastable α1* configurational isomer of the {V14Sb8O42} cluster type. Contrary to all other polyoxovanadate shell architectures, this isomer comprises an inward‐oriented vanadyl group and is ca. 50 and 12 kJ mol?1 higher in energy than the previously isolated α and β isomers, respectively. We discuss this unexpected reaction in light of supramolecular Sb?O???V and Sb?O???Sb contacts manifested in {V14Sb8O42}2 dimers detected in the solid state. ESI MS experiments confirm the stability of these dimers also in solution and in the gas phase. DFT calculations indicate that other, as of yet elusive isomers of {V14Sb8}, might be accessible as well. |
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| Keywords: | antimonato polyoxovanadates configurational isomerism DFT calculations ESI MS polyoxometalates |
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