Search for: [Abstract = "The aim of investigations was to find out the dependence between the position of methyl group and the rate or the hydrolytic degradation reaction in the presence of β\-cyclodextrin. The investigated hydrolysis reactions \: of 2\-thioluminal and its N\-methyl and N,N'\-dimethyl derivatives were run in the presence of 0%, 0.5%, 1.0% and 1.5% of β\-cyclodextrin. There were three main tasks in measurements and calculations. The first was to describe the kinetics of the reactions. The second was to confirm formation of inclusion complexes between the β\-cyclodextrin and the investigated compounds, and that was determined by 1H NMR, 13C NMR spectroscopy and molecular modelling \(AM1\). The last one is to describe reactions by molecular modelling. Kinetic investigations were carried out spectrophotometrically under different conditions of pH, temperature and β\-cyclodextrin concentration. Molecular modelling of the investigated reactions was , preformed using semiempirical \(PM3\) and ab initio \(Hartree\-Fock. basis 3\-21 G\) methods."]

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