M. Napier, C. Friend
Apr 3, 1996
Citations
0
Influential Citations
7
Citations
Journal
Langmuir
Abstract
The reaction of 4,4,4-trifluorobutanethiol on Mo(110) was studied using temperature-programmed reaction, Auger electron, and infrared spectroscopies. The chemistry of trifluoro-1-butanethiol on clean Mo(110) at saturation coverage closely resembles the chemistry observed for 1-butanethiol and trifluoroethanethiol, but there are important differences arising from the presence of fluorine and the length of the alkyl chain. The dominant decomposition pathway for CH3(CH2)3S−, CF3(CH2)3S−, and CF3CH2S− is C−S bond hydrogenolysis at approximately 300 K to form butane, trifluorobutane, and trifluoroethane, respectively. A secondary pathway is alkene elimination from CH3(CH2)3S−, CF3(CH2)3S−, and CF3CH2S− to form butene, trifluorobutene, and difluoroethylene, respectively, over a wide temperature range, 200−550 K. The primary difference in the chemistry comparing the two C4 thiolates, the fluorinated and nonfluorinated, is the observation of difluoroethylene from CF3(CH2)3S− at 540 K. No ethylene or other hydroca...