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

Macedonian Journal of Chemistry and Chemical Engineering

Katica Čolančevska-Ragenoviќ¹  Mirjana Jankulovska²  Saško Ristovski²  Lidija Šoptrajanova²  Ilinka Spirevska² 

[1] Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University of Skopje, Skopje;Institute of Chemistry, Faculty of Natural Sciences and Mathematics,SS Cyril and Methodius University of Skopje,Arhimedova 5, Skopje;

关键词: 4-butyl-5-octyl-2,4-dihydro-3h-1,2,4-triazoline-3-thione;    4-allyl-5-octyl-2,4-dihydro-3h-1,2,4-triazoline- 3-thione;    4-phenyl-5-octyl-2,4-dihydro-3h-1,2,4-triazoline-3-thione;    electronic absorption spectra;    solvent effects;    linear solvation energy relatio;   

DOI  :  10.20450/mjcce.2010.171

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown