1. Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, Department of Chemistry, University of Tennessee, 409 Buehler Hall, Knoxville, Tennessee 37996, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QZ, U.K., Department of Chemistry and Biochemistry, University of CaliforniaSan Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093, and Department of Chemistry and Biochemistry, University of MassachusettsDartmouth, North...