Catalysis Letters, Vol.24, No.1-2, 141-146, 1994
FT-Ir Characterization of Carbenium Ions, Intermediates in Hydrocarbon Reactions on H-ZSM-5 Zeolites
A series of N-alkylacetonitrilium ions were characterized by IR spectroscopy on an activated H-ZSM-5 sample pretreated by CD3CN with various adsorbed olefins. Two kinds of nu(C=N) band were evidenced according to whether the carbenium ion is secondary (2387 cm-1) or tertiary (2376 cm-1). The method is able to detect the isomerization intermediates of cyclohexene into methyl-cyclopentene.