1. Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
2. Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø; Norway
3. Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
4. Institut für Organische Chemie; Technische Universität Braunschweig; Hagenring 30 D-38106 Braunschweig Germany