1. Instituto de Ciencia Molecular, Universitat de València, Apartado 22085, ES-46071
Valencia, Spain
2. Department
of Chemistry −
Ångstrom, Theoretical Chemistry Program, Uppsala University, Box 518, 75120 Uppsala, Sweden
3. Dipartimento di Chimica “G.
Ciamician”, Università di Bologna, Via Selmi 2, 40126 Bologna, Italy