1. Insitute of Inorganic Chemistry University of Duisburg-Essen Universitätsstr. 7 45141 Essen Germany
2. Institute of Inorganic Chemistry Christian-Albrecht University of Kiel Max-Eyth-Str. 2 24118 Kiel Germany
3. Institute of Crystallography RWTH Aachen Jägerstr. 17–19 52066 Aachen Germany
4. Avantium Technologies B.V. Zekeringstraat 29 1014 BV Amsterdam (The Netherlands