1. Contribution from the Newman and Wolfrom Laboratory of Chemistry, Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, the Department of Chemistry, University of San Francisco, 2130 Fulton Street, San Francisco, California 94117-1080, the Department of Chemistry, Box 351700, University of Washington, Seattle, Washington 98195-1700, and Institute of Chemical Kinetics and Combustion and Novosibirsk State University, 630090 Novosibirsk, Russia