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

Journal Article · Wed Oct 29 00:00:00 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), Vol. 108:22
• Country of Publication: United States
• Language: English

Related Subjects

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