1. Department of Chemistry and
Warwick Centre for Analytical Science, University of Warwick, Coventry, CV4 7AL, U.K.
2. Gaussian Inc.,
340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492-4050,
United States
3. Department
of Physics, University of Warwick, Coventry,
CV4 7AL, U.K.
4. Department
of Chemistry, Syracuse University, Syracuse,
New York, 13244, United
States