Models for reactions of acetylene on platinum(111): the vinylidene intermediate

Journal Article · Wed Oct 29 04:00:00 EST 1986 · J. Am. Chem. Soc.; (United States)

DOI:https://doi.org/10.1021/ja00282a050· OSTI ID:7032669

Rashidi, M; Puddephatt, R J

One of the most studied surface reactions is that of acetylene on platinum(111). A ..mu../sub 3/-eta/sup 2/-acetylene complex is formed at low temperature but this rearranges on warming to a ..mu../sub 3/-eta/sup 2/-vinylidene, Pt/sub 3/(..mu../sub 3/-eta/sup 2/-C=CH/sub 2/), which then reacts with surface-bound hydrogen to give a ..mu../sub 3/-ethylidyne, Pt/sub 3/(..mu../sub 3/-CMe). Since the cluster (Pt/sub 3/(..mu../sub 3/-H)(..mu..-dppm)/sub 3/)/sup +/ (dppm = Ph/sub 2/PCH/sub 2/PPh/sub 2/) acts as a useful model for the triply bridging sites on a Pt(111) surface, a study of its reaction with acetylene was initiated with the aim of isolating complexes having the above functional groups, none of which appears to be known. This article reports the formation of a stable ..mu../sub 3/-eta/sup 2/-C=CH/sub 2/ complex.

• Research Organization: Univ. of Western Ontario, London
• OSTI ID: 7032669
• Journal Information: J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 108:22; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACETYLENE
ALKYNES
CHEMICAL REACTIONS
COMPLEXES
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
MAGNETIC RESONANCE
METALS
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
PLATINUM
PLATINUM METALS
REACTION INTERMEDIATES
RESONANCE
SPECTRA
SURFACES
TRANSITION ELEMENTS