Contribution from the Leiden Institute of Chemistry, Leiden University, Gorlaeus Laboratories, P.O. Box 9502, 2300 RA, Leiden, the Netherlands, Department of Chemistry and Centro SCS, University of ...

Contribution from the Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, and Chemistry Department, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, ...