1. Chemistry Department, Bowling Green State University, Bowling Green, Ohio 43403, United States
2. Departamento de Química Física, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
3. Laboratoire Chimie Provence UMR 6264, Université de Provence, Campus Saint Jérôme Case 521, 13397 Marseille Cedex 20, France
4. Department of Quantum Chemistry, Ångströmlab, Lägerhyddsv. 1, Box 518, 751 20 Uppsala University, Sweden
5. Dipartimento di Chimica, Università degli Studi di Siena, via Aldo Moro 2, I-53100 Siena, Italy