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OPTICAL ABSORPTION SPECTRA OF (E)-2-(2-ARYL-1-CYANOVINYL)-4-CYCLOPROPYLTHIAZOLES
Abstract
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 solutions. It is shown that the acceptor substituents introduction leads to a bathochromic shift of absorption. This is explained by the fact that they promote the delocalization of electrons of unoccupied pairs of nitrogen and sulfur of the thiazole ring. Absorption bands in the range of 250—450 nm arise from HOMO→LUMO and HOMO-1→LUMO transitions.
About the Authors
A. A. TikhiiRussian Federation
Lugansk
I. V. Zhikharev
Russian Federation
Donetsk
V. D. Dyachenko
Russian Federation
Lugansk
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Review
For citations:
Tikhii A.A., Zhikharev I.V., Dyachenko V.D. OPTICAL ABSORPTION SPECTRA OF (E)-2-(2-ARYL-1-CYANOVINYL)-4-CYCLOPROPYLTHIAZOLES. Zhurnal Prikladnoii Spektroskopii. 2025;92(1):22-31. (In Russ.)