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Spectroscopy Letters
An International Journal for Rapid Communication
Volume 30, 1997 - Issue 7
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Original Articles

Infra-Red Study of Tautomerism in Some Schiff Bases.

Salman R. Salman Chemistry Department, Faculty of Science, Yarmouk University, P.O. Box 4790, Irbid, Jordan
&
Na'il A. I. Saleh Chemistry Department, Faculty of Science, Yarmouk University, P.O. Box 4790, Irbid, Jordan
Pages 1289-1300 | Received 02 Feb 1997, Accepted 21 Apr 1997, Published online: 22 Aug 2006
 
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Abstract

Infra-Red spectra of a series of substituted salicylaldehyde and 2-hydroxy-naphthaldehyde Schiff bases were used to investigate enol-keto tautomeric equilibrium. Two model compounds, namely, salicylidinaniline and naphthylidinequinolineamine Schiff bases were used to represent the enol and keto forms, respectively. From the IR spectra of the model compounds it was possible to assign the IR absorption for the C=O and the C=N groups in both the keto and the enol form. It was also possible to assign other absorptions which were either specific to the keto or the enol forms. Specific pattern were observed for all the studied compounds.

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