The mechanism of isomerization of aliphatic hydrocarbons at a platinum surface

摘要: Abstract The present paper discusses a process by which C4 and C5 alkane isomerization may occur at platinum surface. model proposes that the surface precursor is 1,3-diadsorbed with double bond to one carbon atom [e.g., structure (C), Fig. 2], occurs transformation of this bridged (D), 2]. likelihood discussed in terms energy difference between corresponding intermediate. energies were calculated simple Huckel MO method. effect methyl group hyperconjugation on facilitating considered explicitly, while differing electronegativities qualitatively. It shown criterion for favorable where there partial electron transfer from hydrocarbon residue metal atom, remains possible finite values overlap forming atom. provides more detailed interpretation results obtained previously using C13-labeled n-butane reaction.