1. Faculty of Chemistry and Pharmacy, Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
2. Faculty of Chemistry and Pharmacy, Institute of Inorganic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
3. Department of Chemical Sciences, University of Padova, Via Francesco Marzolo 1, 35131 Padova, Italy