1. Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
2. Mulliken Center for Theoretical Chemistry Rheinische Friedrich‐Wilhelms‐Universität Bonn Beringstraße 4 53115 Bonn Germany
3. Institute of Chemistry University of Tartu 14a Ravila str 50411 Tartu Estonia