1. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Vas. Constantinou 48, GR-116 35 Athens, Greece
2. ICGM, Université de Montpellier, CNRS, ENSCM, 34000 Montpellier, France
3. Laboratory of Quantum and Computational Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
4. Department of Chemistry, University of Crete, Voutes, Heraklion, 71003 Crete, Greece