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Lytken O, Lew W, Harris JJ, et al. Energetics of cyclohexene adsorption and reaction on Pt(111) by low-temperature microcalorimetry. J Am Chem Soc. 2008;130(31):10247-57doi: 10.1021/ja801856s.
Lytken, O., Lew, W., Harris, J. J., Vestergaard, E. K., Gottfried, J. M., & Campbell, C. T. (2008). Energetics of cyclohexene adsorption and reaction on Pt(111) by low-temperature microcalorimetry. Journal of the American Chemical Society, 130(31), 10247-57. https://doi.org/10.1021/ja801856s
Lytken, Ole, et al. "Energetics of cyclohexene adsorption and reaction on Pt(111) by low-temperature microcalorimetry." Journal of the American Chemical Society vol. 130,31 (2008): 10247-57. doi: https://doi.org/10.1021/ja801856s
Lytken O, Lew W, Harris JJ, Vestergaard EK, Gottfried JM, Campbell CT. Energetics of cyclohexene adsorption and reaction on Pt(111) by low-temperature microcalorimetry. J Am Chem Soc. 2008 Aug 06;130(31):10247-57. doi: 10.1021/ja801856s. Epub 2008 Jul 11. PMID: 18616251.
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J Am Chem Soc. 2008 Aug 06;130(31):10247-57. doi: 10.1021/ja801856s. Epub 2008 Jul 11.

Energetics of cyclohexene adsorption and reaction on Pt(111) by low-temperature microcalorimetry.

Journal of the American Chemical Society

Ole Lytken, Wanda Lew, Jonathan J W Harris, Ebbe K Vestergaard, J Michael Gottfried, Charles T Campbell

Affiliations

  1. Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, USA.

PMID: 18616251 DOI: 10.1021/ja801856s

Abstract

The heat of adsorption and sticking probability of cyclohexene on Pt(111) were measured as a function of coverage using single-crystal adsorption calorimetry in the temperature range from 100 to 300 K. At 100 K, cyclohexene adsorbs as intact di-sigma bonded cyclohexene on Pt(111), and the heat of adsorption is well described by a second-order polynomial (130 - 47 theta - 1250 theta(2)) kJ/mol, yielding a standard enthalpy of formation of di-sigma bonded cyclohexene on Pt(111) at low coverages of -135 kJ/mol and a C-Pt sigma bond strength of 205 kJ/mol. At 281 K, cyclohexene dehydrogenates upon adsorption, forming adsorbed 2-cyclohexenyl (c-C6H(9,a)) and adsorbed hydrogen, and the heat of adsorption is well described by another second-order polynomial (174 - 700 theta + 761 theta(2)) kJ/mol. This yields a standard enthalpy of formation of adsorbed 2-cyclohexenyl on Pt(111) at a low coverage of -143 kJ/mol. At coverages below 0.10 ML, the sticking probability of cyclohexene on Pt(111) is close to unity (>0.95), independent of temperature.

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