Investigation of solvent effects on electronic absorption spectra of some substituted 1,2,4-triazoline-3-thiones

Authors

  • Mirjana Jankulovska Institute of Chemistry, Faculty of Natural Sciences and Mathematics, SS Cyril and Methodius University of Skopje, Arhimedova 5, Skopje
  • Lidija Šoptrajanova Institute of Chemistry, Faculty of Natural Sciences and Mathematics, SS Cyril and Methodius University of Skopje, Arhimedova 5, Skopje
  • Ilinka Spirevska Institute of Chemistry, Faculty of Natural Sciences and Mathematics, SS Cyril and Methodius University of Skopje, Arhimedova 5, Skopje
  • Katica Čolančevska-Ragenoviќ Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University of Skopje, Skopje
  • Saško Ristovski Institute of Chemistry, Faculty of Natural Sciences and Mathematics, SS Cyril and Methodius University of Skopje, Arhimedova 5, Skopje

DOI:

https://doi.org/10.20450/mjcce.2010.171

Keywords:

4-butyl-5-octyl-2, 4-dihydro-3H-1, 2, 4-triazoline-3-thione, 4-allyl-5-octyl-2, 4-triazoline- 3-thione, 4-phenyl-5-octyl-2, electronic absorption spectra, solvent effects, linear solvation energy relatio

Abstract

The influence of the polarity of the solvent and hydrogen bonding on the electronic absorption spectra of some previously synthesized substituted 1,2,4-triazoline-3-thiones was studied. The electronic absorption spectra of investigated compounds were recorded in the region from 190 nm to 360 nm in eight protic (water, ethylene glycol, methanol, ethanol, propan-1-ol, propan-2-ol, butan-1-ol and tert-butanol) and five aprotic (acetonitrile, chloroform, dimethylsulfoxide, dimethylformamide and dioxane) solvents. Their absorption maxima appeared in the region between 250 nm and 260 nm as a result of the electron transitions in the 1,2,4-triazoline-3-thione ring. Using the method of linear solvation energy relationships (LSER), the effects of solvent polarity and hydrogen bonding on the electronic absorption spectra were interpreted. The results have shown that the influence of the aprotic solvents is more significant compared to that of the protic solvents.

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Published

2010-06-15

How to Cite

Jankulovska, M., Šoptrajanova, L., Spirevska, I., Čolančevska-Ragenoviќ K., & Ristovski, S. (2010). Investigation of solvent effects on electronic absorption spectra of some substituted 1,2,4-triazoline-3-thiones. Macedonian Journal of Chemistry and Chemical Engineering, 29(1), 43–50. https://doi.org/10.20450/mjcce.2010.171

Issue

Vol. 29 No. 1 (2010)

Section

Spectroscopy

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