1. Department
of Chemistry and Centre for Theoretical and Computational Chemistry
(CTCC), University of Oslo, Postbox 1033 Blindern, 0315 Oslo, Norway
2. Institut
Charles Gerhardt, UMR 5253 CNRS-Université de Montpellier, Université de Montpellier, cc 1501, Place E. Bataillon, 34095 Montpellier, France