1. Department of Physics, Chemistry and Pharmacy; University of Southern Denmark; Odense M DK-5230 Denmark
2. Division of Theoretical Chemistry and Biology, School of Biotechnology; KTH Royal Institute of Technology; Stockholm SE-106 91 Sweden
3. Centre for Computational Chemistry, School of Chemistry, University of Bristol; Bristol BS8 1TS United Kingdom
4. Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø-The Arctic University of Norway; Tromsø N-9037 Norway