1. Department of Chemistry, University of Helsinki, P.O. Box 55 (A.I. Virtanens plats 1), FIN-00014
Helsinki, Finland
2. Centre
for Theoretical and Computational Chemistry (CTCC), Department of
Chemistry, University of Oslo, P.O. Box
1033 Blindern, 0315 Oslo, Norway
3. Department of Applied Chemistry, Graduate School of Engineering, Tohoku
University, Aoba-yama 6-6-07, Sendai 980-8579, Japan