1. Department of Chemistry and Chemical
Sciences Division of Lawrence
Berkeley National Laboratory, University of California, Berkeley, California 94720-1460, United
States
2. LPCNO, Université de Toulouse, INSA, UPS, LPCNO, 135 avenue de Rangueil,
F-31077 Toulouse, France, and CNRS, LPCNO, F-31077 Toulouse, France
3. Institut Charles Gerhardt, Université Montpellier 2, CNRS 5253, cc 1501,
Place E. Bataillon, F-34095 Montpellier France.