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Electronic absorption spectra of 3-β-carboxyethylrhodanine and its 5-arylidene derivatives

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

The UV spectra of 3-β-carboxyethylrhodanine and its 5-arylidene derivatives comprise four bands. The first absorption band with a peak at 239 mμ is not very characteristic of rhodanines. The second band, connected with the presence of the chromophore \(\begin{gathered} > {\text{N}}{}^{\text{\_}}{\text{C = S}} \hfill \\ {\text{ |}} \hfill \\ \end{gathered} \), is characterized by peaks in the 243–281 mμ region.

The peak of the third absorption band at about 300 mμ, is connected with the presence of an amide chromophore, which shifts bathochromically on introduction of a benzylidene group; subsequent introduction of nitro groups results in its being displaced hyposochromically. The most characteristic feature of the 5-arylidene derivatives is formation of a very intense K absorption band in the 360–466 mμ region, superimposed on the corresponding low-intensity 3-β-carboxyethylrhodanine absorption band.

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References

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Turkevich, B.M. Electronic absorption spectra of 3-β-carboxyethylrhodanine and its 5-arylidene derivatives. Chem Heterocycl Compd 2, 149–151 (1967). https://doi.org/10.1007/BF00480958

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  • DOI: https://doi.org/10.1007/BF00480958

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