(4) Both k, and kd may oe pressure dependent, but not their ratio, (5) S. W. Benson and G. N. Spokes, J. Am. Chem. SOC., 89, 2525 (6) Postdoctoral research associate. ... David M. Golden, Norman A. Gat: Sidney W. Benson Department of Thermochemistry and Chemical Kinetics 94025 ReceiGed January 8, I969 Stanford Research Institute, Merrlo Park, California ... Coordination and Transition Metal Catalyzed Ring Opening of Some Hydrocarbons Containing ...