RESEARCH PAPER
Preparation and diagnosis of new dyes for pyrimidine-2, 4, 6(1H, 3H, 5H)-trione
 
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Online publication date: 2019-02-23
Publication date: 2019-09-23
 
Eurasian J Anal Chem 2019;14(1):emEJAC201901
 
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ABSTRACT
The research includes the preparation of new azo-barbiturate dyes derived from shiff bases prepared by reaction Barbituric acid & phenlenediamine and repellency bases by means of double-reaction of repellant bases with different phenolic compounds. These compounds were diagnosed using infrared techniques, ultraviolet-visible radiation, NMR proton and thin layer chromatography. All barbiturate dyes had absorption between (273 – 310) nm and showed hypsochromic shift from the corresponding azo dyes. The crystal structures of barbiturate dyes indicated that barbiturate ring is sterically hindered by phenol rings
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