Dissociative chemisorption, thiophene

Figure 5 shows that the dissociative chemisorption of butanethiol is much lower than that of thiophene. But these results were obtained at a... 

Verna (62) studied the dissociative adsorption of thiophene on platinum, palladium, and rhodium dispersed on alumina. Figure 7 and Table II present the dissociative chemisorption of thiophene to butane on the three metals. The sulfur coverage of platinum is very low compared to the other metals. The sulfur coverage on palladium is about 2.5 times higher than on platinum such a value is similar to the one found by Mathieu and Primet (63). 

Fig. 7. Formation of butane as a function of time, during the dissociative chemisorption of thiophene on different metals.

Boitiaux et al. and Verna (61, 62) studied the dissociative chemisorption of thiophene in the presence of isoprene and of the corresponding methyl-butenes on palladium. Figure 8 records the results of a typical experiment carried out with a mixture of thiophene and 3 mol% isoprene in heptane. The evolution of isoprene, isopentenes, and isopentane is shown as a... 

Carbon disulfide At room temperature, only physisorption occurs on Pt film [2], while partly reversible adsorption takes place on Pd film [31 with 0.7 chemisorbed coverage. The adsorption is believed to be dissociative over this latter surface [3]. Hydrogen can be adsorbed over CS2-covered Pt film [2] but cannot over CS2-covered Pd film [3]. Thiophene At room temperature, chemisorption occurs through the lone pair of sulfur... 

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