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<p>The optical absorption spectra of (E)-2-(2-aryl-1-cyanovinyl)-4-cyclopropylthiazole derivatives with different substituents in the para position of the aryl ring have been studied. The measurements were carried out in dimethylformamide solution. The introduction of electron-withdrawing substituents leads to a bathochromic shift since these substituents promote delocalization of the thiazole ring nitrogen and sulfur unshared electron pairs. The absorption bands at 250–450 nm arise from HOMO → LUMO and HOMO–1 → LUMO transitions.</p>

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Optical Absorption Spectra of (E)-2-(2-Aryl-1-Cyanovinyl)-4-Cyclopropylthiazoles

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • A. A. Tikhii,
  • I. V. Zhikharev,
  • V. D. Dyachenko

摘要

The optical absorption spectra of (E)-2-(2-aryl-1-cyanovinyl)-4-cyclopropylthiazole derivatives with different substituents in the para position of the aryl ring have been studied. The measurements were carried out in dimethylformamide solution. The introduction of electron-withdrawing substituents leads to a bathochromic shift since these substituents promote delocalization of the thiazole ring nitrogen and sulfur unshared electron pairs. The absorption bands at 250–450 nm arise from HOMO → LUMO and HOMO–1 → LUMO transitions.