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Mechanistic Studies on the Reaction of 0-phthalaldehyde (OPTA) with Urea and its N-alkyl/aryl Derivatives

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dc.contributor.author BUSHRA MALIHA
dc.contributor.author ISHTIAQ HUSSAIN
dc.contributor.author TARIQ, MUHAMMAD ILYAS
dc.contributor.author SIDDIQUI, HAMID LATIF
dc.date.accessioned 2023-09-19T09:55:04Z
dc.date.available 2023-09-19T09:55:04Z
dc.date.issued 2009-10-20
dc.identifier.citation Maliha, B., & Hussain, I. (2009). Mechanistic Studies on the Reaction of o-phthalaldehyde (OPTA) with Urea and its N-allqUaryl Derivatives. J. Chem. Soc. Pak, 31(5). en_US
dc.identifier.issn 0253-5106
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/19656
dc.description.abstract Urea and its N-alkyl/aryl derivatives react with o-phthalaldehyde (OPTA) to yield blue to purple coloration along-with isoindoline compounds (VII a,b,c) in acidic media. The color is unstable and changes into various shades with the passage of the time. The assay of urea which entirely depends upon this color does not suggest its determination with OPTA present in biological and non-biological fluids. Moreover, it is found that compounds which enhance color stability have nothing to do with determination of urea. The structures of isoindolines (VII a,b,c) have been confirmed by IH-, BC-NMR and mass spectrometry techniques. The absolute authenticity comes from their (VII a,b,c) X-ray crystallography. The colors resulting from the said reactions fall in between 585-595 nm in UVNIS spectra. As the use of OPTA for urea determination is known, hence, in this study, we are presenting chemistry for urea determination With OPTA. en_US
dc.description.sponsorship The chemical society of Pakistan is an approved society from the PSF. en_US
dc.language.iso en en_US
dc.publisher HEJ Research Institute of Chemistry, University of Karachi, Karachi. en_US
dc.title Mechanistic Studies on the Reaction of 0-phthalaldehyde (OPTA) with Urea and its N-alkyl/aryl Derivatives en_US
dc.type Article en_US


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