1. Physical Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Egerlandstrasse 3, 91058 Erlangen, Germany
2. Organic Chemistry I, Department of Chemistry and Pharmacy, University of Erlangen-Nuremberg, Henkestraße 42, 91054 Erlangen, Germany
3. Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada