Z. Naturforsch. 2014, 69b, 1306 – 1314
Interconnection of [V15As6O42(H2O)]6− Clusters by Cu2+-centered Complexes: Synthesis, Crystal Structure and Selected Properties
Adam Wutkowski1, Christian Näther1, Jan van Leusen2, Paul Kögerler2, and Wolfgang Bensch1
1 Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 2, D-24118 Kiel, Germany
2 Institut für Anorganische Chemie, RWTH Aachen, D-52074 Aachen, Germany
Reprint requests to Prof. W. Bensch. Phone: +49 431 880-2419. Fax: +49 431 880-1520. E-mail: wbensch@ac.uni-kiel.de
Received July 25, 2014 / published online December 19, 2014
Dedicated to Professor Hubert Schmidbaur on the occasion of his 80th birthday
The compound {[Cu(C5H14N2)2]3[V15As6O42(H2O)]} was synthesized under solvothermal conditions. During the reaction the VV species of NH4VO3 are reduced to VIV providing the 15 reduced VIV centers in the anionic cluster. The compound crystallizes in the non-centrosymmetric orthorhombic space group P212121 with four formula units in the cell, V = 9464.8(4) Å3. The structure features [V15As6O42(H2O)]6− anions which are joinded by Cu2+-centered complexes to form linear chains. If a long Cu–O bond is considered as weak intermolecular interaction a three-dimensional network is generated. The compound is partially soluble in water as evidenced by UV/Vis spectroscopy and mass spectra. The magnetic susceptibility of the compound is dominated by strong intra-cluster antiferromagnetic exchange interactions.
Key words: Polyoxovanadate, Solvothermal Synthesis, Magnetic Properties, Crystal Structure
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