Chinese Journal of Magnetic Resonance ›› 1998, Vol. 15 ›› Issue (2): 169-172.
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Wang Mingan, Liu Jun, Ren Tianrui, Chen Fuheng, Shen Qifeng
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Abstract: The solvent and temperature effects on the Keto-Enol tautomerism of 6, 8-dimethyl-1, 2, 4-triazolopyrimidine-3-butandione sulfide were studied by 1H NMR method in chloroform, acetone, methanol and DMSO. The equilibrium constants were diminished with the rising of temperature and fairly good linear relationship were found to be present between logK and T-1. The ΔH and ΔS in these solvents have been obtained.
Key words: 6,8-dimethyl-1, 2, 4-triazolopyrimidine-3-butandione sulfide, Keto-Enoltautomerism, Solvent and temperature effects
Wang Mingan, Liu Jun, Ren Tianrui, Chen Fuheng, Shen Qifeng. STUDIES ON THE KETO-ENOL TAUTOMERISM OF 6, 8-DIMETHYL-1, 2, 4-TRIAZOLOPYRIMIDINE-3-BUTANDIONE SULFIDE BY 1H NMR[J]. Chinese Journal of Magnetic Resonance, 1998, 15(2): 169-172.
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URL: http://magres.apm.ac.cn/EN/
http://magres.apm.ac.cn/EN/Y1998/V15/I2/169
