Abstract
5-Arylidenerhodanines and the previously undescribed 5-[5-(4-R-phenyl)furfurylidene]rhodanines were synthesized by the Andreasch method. It is assumed that Fermi resonance appears in the IR spectra of some of these compounds in the region of carbonyl absorption; bands of associated N-H bonds were identified. It is shown that in the case of 4-N(CH3)2-benzylidenerhodanine the long-wave band in the electronic spectra is a bathochromically shifted band of the same nature as the band in the spectra of 5-arylidenerhodanine derivatives with weak donor groups. The introduction of an arylfurfurylidene grouping gives rise to a substantial bathochromic shift of the absorption band of their molecules.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1490–1494, November, 1977.
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Yaremenko, F.G., Kolos, N.N., Orlov, V.D. et al. Spectrophotometric study of 5-arylidene- and 5-(5-arylfurfurylidene)rhodanines. Chem Heterocycl Compd 13, 1190–1194 (1977). https://doi.org/10.1007/BF00475942
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DOI: https://doi.org/10.1007/BF00475942