1. Institute of Physical and Theoretical Chemistry
2. Goethe University
3. 60438 Frankfurt am Main
4. Germany
5. Theoretical and Computational Chemistry
6. Interdisciplinary Center for Scientific Computing (IWR)
7. University of Heidelberg
8. 69120 Heidelberg
9. Institute of Organic Chemistry
10. Justus-Liebig University Giessen
11. 35392 Giessen