C. Bol, C. Friend
1995
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0
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Journal
Surface Science
Abstract
Abstract The unprecedented combination of sulfur removal and selective oxygen addition is observed in the formation of acetone from 2-propanethiol on Rh(111)-p(2 × 1)-O. The reaction is studied by temperature programmed reaction spectroscopy, and acetone is identified on the basis of the mass spectrometer intensity distribution. Propene elimination via C-S bond scission and selective β-hydrogen elimination also occurs. 2-propyl thiolate forms upon adsorption at ~ 100 K and the reaction is proposed to proceed via 2-propyl. β-hydrogen elimination from 2-propyl would yield propene, while oxygen addition would afford 2-propoxide which readily forms acetone. The competing combustion process proceeds via an undetermined pathway. These reactions offer insight into the control of selective C-H bond activation by oxygen on Rh (111) which has broad significance in oxidation chemistry.