6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚酮-烯醇互变异构平衡的1H NMR研究

波谱学杂志 ›› 1998, Vol. 15 ›› Issue (2): 169-172.

6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚酮-烯醇互变异构平衡的¹H NMR研究

王明安, 刘军, 任天瑞, 陈馥衡, 沈其丰

中国农业大学应用化学系, 北京 100094

收稿日期:1997-09-08 修回日期:1997-09-29 出版日期:1998-04-05 发布日期:2018-01-13
作者简介:王明安,男,33岁,博士,副教授

STUDIES ON THE KETO-ENOL TAUTOMERISM OF 6, 8-DIMETHYL-1, 2, 4-TRIAZOLOPYRIMIDINE-3-BUTANDIONE SULFIDE BY ¹H NMR

Wang Mingan, Liu Jun, Ren Tianrui, Chen Fuheng, Shen Qifeng

Department of Applied Chemistry, China Agricultural University, Beijing 100094

Received:1997-09-08 Revised:1997-09-29 Online:1998-04-05 Published:2018-01-13

摘要/Abstract

摘要： 用¹H NMR方法研究了不同溶剂和温度对6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚酮-烯醇互变异构平衡的影响,发现温度升高有利于平衡向酮式转变,而溶剂极性的改变对平衡的影响并不规律,获得了四种溶剂中的ΔH和ΔS.

关键词: 6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚, 酮-烯醇互变异构, 溶剂及温度效应

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

王明安, 刘军, 任天瑞, 陈馥衡, 沈其丰. 6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚酮-烯醇互变异构平衡的¹H NMR研究[J]. 波谱学杂志, 1998, 15(2): 169-172.

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.

6,8-二甲基-1,2,4-三唑并嘧啶-3-丁二酮基硫醚酮-烯醇互变异构平衡的¹H NMR研究

STUDIES ON THE KETO-ENOL TAUTOMERISM OF 6, 8-DIMETHYL-1, 2, 4-TRIAZOLOPYRIMIDINE-3-BUTANDIONE SULFIDE BY ¹H NMR

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