The influence of polarizability in metal cluster reactions as seen in the reactions of gas-phase W clusters with cyclopropane

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DOIResolve DOI: http://doi.org/10.1063/1.476591
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TypeArticle
Journal titleThe Journal of Chemical Physics
ISSN0021-9606
Volume109
Issue2
Pages551
AbstractAbsolute second-order rate coefficients for the reaction of Wₙ with cyclopropane have been measured using a large-bore flow tube reactor coupled with a laser ablation metal cluster source and a laser ionization/time-of-flight mass spectrometric detector. Rate coefficients for the depletion of W clusters by cyclopropane in He carrier gas show no helium bath gas pressure dependence between 0.5 and 2.0 Torr but decrease with increasing temperature between 277 and 351 K. Reaction rates are significantly higher than those predicted by a simple hard-sphere collision model. A polarizability-based model has been successfully employed to explain the reactivity observed. The model implicates van der Waals complexes as precursors to chemisorption of cyclopropane by Wₙ
Publication date
PublisherAIP Publishing
LanguageEnglish
AffiliationNational Research Council Canada; Security and Disruptive Technologies
Peer reviewedYes
NPARC number21277568
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Record identifier6ea50605-56ba-45f2-a343-d75cd9a16b17
Record created2016-04-19
Record modified2016-05-09
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