1. Contribution from the Department of Chemistry, University of Alabama, Tuscaloosa, Alabama, 35487-0336, William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, Department of Chemistry, Washington State University, Pullman, Washington 99164-4630, Loker Hydrocarbon Research Institute, University of Southern California, University Park, Los Angeles, California 93524, and Chemistry Department, McMaster University, Hamilton,...