1. Department of Chemistry, Acadia University, Wolfville, NS B4P 2R6, Canada
2. Theory Department, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6,14195 Berlin, Germany
3. Institut für Physikalische Chemie, Karlsruher Institut für Technologie (KIT), Kaiserstr. 12, 76131 Karlsruhe, Germany
4. Alberta Sulphur Research Ltd., #6, 3535 Research Road NW, Calgary, Alberta T2L 2K8, Canada