“…However, if one starts with cyclopropane, a molecule of much higher free energy, 1,3-diadsorbed alkane is a very probable intermediate in the hydrogenolysis to propane. 14 1,4-Diadsorbed butane is a probable intermediate in the much slower hydrogenolysis of cyclobutane.9 The major product of exchange of norbornane contains a pair of eclipsed deuterium atoms as shown in D. Thus, 1,2diadsorbed alkanes readily form in eclipsed conformations. Staggered conformations are not favored.…”