1. Karlsruhe Institute of Technology (KIT), Institute of Physical Chemistry, KIT Campus South, P.O. Box 6980, D-76049 Karlsruhe, Germany
2. School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
3. Centre for Advanced Study (CAS) at the Norwegian Academy of Science and Letters, Drammensveien 78, N-0271 Oslo, Norway
4. Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, P.O. Box 1033, N-0315 Oslo, Norway
5. Institute of Physical Chemistry, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany