ULTRAVIOLET ABSORPTION SPECTRA OF ARYL SUBSTITUTED UREAS
Open Access
- 1 October 1953
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 31 (10), 896-908
- https://doi.org/10.1139/v53-120
Abstract
Absorption spectra of a number of substituted aryl-and sym-diarylureas have been determined in ethanol. As conjugation in the chromophores increased, a gradual displacement of the maxima of the conjugative absorption band towards the visible occurred. This displacement was accompanied by a progressive increase in intensity of absorption. The effect on the absorption spectra of replacing hydrogen of the aryl substituents by alkoxy, methyl, or halogeno groups is discussed. A relationship between the inductive effect of these groups and their influence on the absorption spectra is indicated.Keywords
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