1. Institute of Inorganic Chemistry, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany
2. Mulliken Center for Theoretical Chemistry, Institute for Physical and Theoretical Chemistry, Beringstraße 4, 53115 Bonn, Germany
3. Leibniz-Institut für Katalyse eV, Albert-Einstein-Straße 29a, 18059 Rostock, Germany