Competitive adsorption of pyridine and sterically hindered pyridines on alumina

Infrared observations have been made which show that 2,6-ditertiary-butyl pyridine can displace coordinatively bound pyridine from an alumina surface. Quantitative examination of the displacement of one base by the other has yielded results which lead to the identification of four different adsorpti...

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Bibliographic Details
Published in:Journal of catalysis 1976-01, Vol.44 (2), p.226-235
Main Authors: Dewing, J., Monks, G.T., Youll, B.
Format: Article
Language:English
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Summary:Infrared observations have been made which show that 2,6-ditertiary-butyl pyridine can displace coordinatively bound pyridine from an alumina surface. Quantitative examination of the displacement of one base by the other has yielded results which lead to the identification of four different adsorption sites on alumina. It is suggested that two of these involve bonding of the base to an electron-deficient oxygen species rather than the hitherto accepted model of coordination direct to an exposed Al 3+ ion.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(76)90393-6