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Applied Spectroscopy

Applied Spectroscopy

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  • Vol. 11, Iss. 4 — Nov. 1, 1957
  • pp: 177–188

An Infrared Study of the Reaction of Barbiturates with p-Nitrobenzyl Chloride

Leslie G. Chatten and Leo Levi

Applied Spectroscopy, Vol. 11, Issue 4, pp. 177-188 (1957)


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Abstract

In alkaline media barbiturates of the general formula HNCONHCOCR'R"CO react with p-nitrobenzyl chloride to give derivatives of the composition NCONCOCH2 C6H2NO2CR'R"COCH2-C6H2NO2: It is postulated that the process of complex formation proceeds via the interaction of a negatively charged enolized barbituric acid ion with a positively charged p-nitrobenzyl ion. The infrared absorption spectra of the derivatives are in accord with this mechanism and suggest that in the complex the barbiturate is bonded to the p-nitrobenzyl money through the carbonyl oxygens in the 4 and 6 positions. The compounds show unique features throughout the region studied, 4000-650 cm−1, and hence the method affords a high degree of specificity for detecting and characterizing these sedative drugs.

Citation
Leslie G. Chatten and Leo Levi, "An Infrared Study of the Reaction of Barbiturates with p-Nitrobenzyl Chloride," Appl. Spectrosc. 11, 177-188 (1957)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-11-4-177

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