- 作者: --
- 作者服務機構: Department of Chemistry, School of Science, Tarbiat Modarres University, P. O. Box 14115-111, Tehran, Iran
- 中文摘要: Hindered internal rotation about the C-N single bonds joining the thiuram disulfide was studied by 1H NMR complete line-shaped analysis in different dimethyl sulfoxide-chloroform (DMSO-CDCl3) mixtures. From the temperature dependence of methyls proton spectra, activation parameters (Ea, ΔH1, ΔS1, and ΔG1) were obtained. The Arrhenius plots showed a distinct isokinetic temperature at about 35 °C at which the exchange rate is more or less independent of the solvent composition. The resulting ΔH1 against TΔS1 plot showed a firmly good linear correlation, indicating the existence of an enthalpy-entropy composition in an exchange process.
- 英文摘要: --
- 中文關鍵字: Dynamic NMR; Tetramethylthiuram disulfide; TMTD; Isokinetic; Exchange kinetic.
- 英文關鍵字: --