EXPERIMENTAL AND THEORETICAL INVESTIGATION OF THE ELECTRONIC ABSORPTION SPECTRA OF 2-H(METHYL, METHYLTHIO, PHENYL)-3,4-DIHYDRO-4-QUINAZOLINYLIDENECYANOACETIC ESTER

Authors

  • А. Г. Ешимбетов S. Yu. Yunusov Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Republic of Uzbekistan, Tashkent 700170
  • М. А. Туляшева S. Yu. Yunusov Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Republic of Uzbekistan, Tashkent 700170
  • Э. Л. Кристаллович S. Yu. Yunusov Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Republic of Uzbekistan, Tashkent 700170
  • Н. Д. Абдуллаев S. Yu. Yunusov Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Republic of Uzbekistan, Tashkent 700170
  • Х. М. Шахидоятов S. Yu. Yunusov Institute of Chemistry of Plant Substances, Uzbek Academy of Sciences, Republic of Uzbekistan, Tashkent 700170

DOI:

https://doi.org/10.1007/8058

Keywords:

2-substituted 4-quinazolinylidenecyanoacetic esters, quantum-chemical calculations, UV spectra

Abstract

The effect of substituents (Me, SMe, Ph) in position 2 has been studied on the nature of the absorption bands of 2-H-3,4-dihydro-4-quinazolinylidenecyanoacetic esters and a very high sensitivity on the substituent  has  been detected for the short wave maxima. On the basis of data calculated by the ZINDO/S method the featureless long-wave  absorption band was assigned to an electronic transition from HOMO to LUMO caused by charge transfer  from fragments of the benzene ring and the N=C–N bond to the >C=C–C=O fragment.

How to Cite
Eshimbetov, A. G.; Tulyasheva, M. A.; Kristallovich, E. L.; Abdullaev, N. D.;  Shakhidoyatov, Kh. M.  Chem. Heterocycl. Compd. 2006, 42, 200. [Khim. Geterotsikl. Soedin. 2006, 227.]

For this article in the English edition, see DOI 10.1007/s10593-006-0072-8


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Published

2023-09-15

Issue

No. 2 (2006)

Section

Original Papers