Azo dye formation in 5-hydroxycoumarins
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The 5-hydroxycoumarins behave very similar to 7-hydroxycoumarins in regard to azo-dye formation with one and more than two molecular proportions of diazotisedp-nitraniline. The significance of these results is discussed.
The authors desire to express their grateful thanks to Prof. T. R. Seshadri for his kind interest in this work.
S Rangaswami1 2 K Ranganadha Rao1 2
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