1. Organic Mass Spectrometry Center, Organic Chemistry Laboratory, University of Mons-Hainaut, 19 Avenue Maistriau, B-7000, Mons, Belgium
2. UMR CNRS 7651, Département de Chimie, Ecole Polytechnique, Laboratoire des Mécanismes Réactionnels, Palaiseau Cedex, France
3. Department of Chemistry and Mathematical Modelling & Computational Science Centre, University of Leuven, Leuven, Belgium