Beobachtung von Elementarprozessen an angeregten Molekülen

Abstract

Primary dissociation processes on excited cyclohexane have been investigated in d. c. and a. c. (50 cycles and 535 cycles) glow discharges. The C2-, C3- and C4-hydrocarbons formed, have been analysed by gaschromatography. These dissociation products can be explained quantitatively by a simple reaction scheme, which is based on C3 : C3⁻, C4 : C2⁻ and C2 : C2 : C2⁻cleavages of the cyclohexane ring and the following intramolecular disproportionation of the biradicals formed. The composition of the dissociation products is more or less identical for the two different a. c. investigations. Different results are observed for a. c. and d. c. glow discharges. The results indicate that the differences in the probabilities for the dissociation processes between a. c. and d. c. glow discharges are caused by the electrical property of the stationary and the moving striations of the positive column.