... E. G. Samsel and J. K. Kochi* Contribution from the Department of Chemistry, University of Houston, University Park, Houston, Texas 77004. Received January 17, 1986 ... 0002-7863/86/ 1508-4790$01.50/0 0 1986 American Chemical Society Page 2. ... Chem. SOC., Vol. 108, No. ...