Trapping-mediated and multilayer-induced dissociative chemisorption of cyclobutane on Ru(001)

Journal Article · Wed Jun 02 04:00:00 EDT 1999 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja983482b· OSTI ID:682020

Weiss, M J; Hagedorn, C J; Weinberg, W H ^[1]

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1. Univ. of California, Santa Barbara, CA (United States). Dept. of Chemical Engineering

The dissociative chemisorption of cyclobutane on the Ru(001) surface has been studied using thermal desorption spectroscopy (TDS) and high-resolution electron energy loss spectroscopy (HREELS). Two distinct methodologies have been used to study this reaction. First, the authors investigated the trapping-mediated reaction by exposing the surface to cyclobutane at 180 K. Second, although an adsorbed monolayer of cyclobutane undergoes nearly complete desorption during subsequent heating, they find that the presence of the condensed multilayer induces significant reaction. Using HREELS they find that both reaction channels yield a common intermediate which they identify to be a C{sub 4}H{sub 8} metallacycle. At moderate and high surface coverages, a small amount of butene from the isomerization of the metallacycle desorbs between 185 and 225 K. Following the desorption of butene, they observe a hydrocarbon fragment on the surface which is tentatively identified to be a C{sub 4}H{sub 4} metallacycle.

• Sponsoring Organization: National Science Foundation, Washington, DC (United States); USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-89ER14048
• OSTI ID: 682020
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 21 Vol. 121; ISSN JACSAT; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
BUTENES
CHEMISORPTION
CYCLOALKANES
DISSOCIATION
REACTION INTERMEDIATES
RUTHENIUM