互变异构

不对称β-二酮分子内氢键及酮-烯醇互变异构的~1HNMR研究

Study on Intramolecular Hydrogen-Bonding and Keto-Enol Tautomerism of Some Asymmetrical β - Diketones by 1H NMR

气相色谱研究β-二酮酯化合物的互变异构

Study on the Tautomerism of β - Keto Esters by Gas Chromatography

~HNMR法研究β-二羰基化合物的酮&烯醇互变异构体系的溶剂效应

1 ~ h NMR studies of solvent effect on keto-enol tautomeric equilibrium of β - dicarbonyl compounds

3-X-2（1H）-吡啶酮互变异构体系的理论计算

Theoretical Calculations of the Tautomeric Equilibrium in 3 X 2 ( 1H ) Pyridones

运用MNDOMO法对五种四唑衍生物的互变异构反应进行了理论计算。

Theoretical calculations on the tautomerization of five tetrazole derivatives are performed with MNDO MO method .

发现了在不同pH介质中喹诺酮类药物的荧光波长和荧光强度的变化规律，并对喹诺酮类药物质子化作用及互变异构现象与荧光性质的相关性进行了考察。

Rules of wavelength and intensity of the fluorescence in different pH medium were discovered . The correlation between the protonation , tautomerism and luminescence characteristics of quinolone are studied . It is found that in pH 6-8 or 2-4 there are two luminescence species .

在模型的构建过程中，考虑了二酮酸类化合物的互变异构现象（酮式和烯醇式）、分子场、电荷以及叠合方式等因素对CoMFA模型的影响。

The influence of tautomerism ( enol and keto ) of DKAs , molecular field , charge , alignment rules and other factors on the CoMFA model were considered .

卤取代对三氮系1-3H原子转移互变异构影响的理论研究

Theoretical Study on the Tautomerism of 1-3H Atom Transformation Reactions at the 3 N System Substituted by Halogen

HMP（DHP）乙醇分子复合物的互变异构能和孤立溶质分子的互变异构能结果很接近，表明溶剂分子参与反应并没有改变互变异构平衡。

The tautomeric energies of DHP ( HMP ) - ethanol clusters is close to that of the isolated solute molecule . It indicates that the solvent molecule have not changed the tautomeric equilibrium .

本文合成一种具有互变异构性能的新型激光染料奇通红。

A new tautomeric laser dye Kiton red has been synthesized .

吲唑、3-卤代吲唑互变异构反应机理的理论研究

Theoretical Study on Reaction Mechanism of Tautomerization of Indazole and 3-halogeno-indazole

偶氮&腙体互变异构及其在染料分子设计中的预报

Azo-Hydrazone Tautomerism and Its Prediction in Dye - molecular Designing

互变异构激光染料奇通红发光特性研究

A study on luminescence of tautomeric laser dye Kiton red

5-卤代1,2,3，-三唑互变异构的密度泛函理论研究

DFT studies on the tautomerization of 1,2,3-triazoles and 5-halogeno-1,2,3-triazoles

偶氮染料的偶氮-醌腙互变异构

Azo - hydr azo ne tautomerism of azo dye

确定其存在着互变异构。

And it is ascertained that there exists the tautomerism of in it .

互变异构的立体化学Ⅰ.烃基丙二酸酯的互变异构平衡的研究

Stereochemistry of tautomerism ⅰ . studies on tautomeric equilibrium of alkyl malonic esters

高效液相色谱法研究对羟基苯丙酮酸烯醇-酮式互变异构动力学

Study on the Keto-enol Tautomerization of 4-hydroxyphenylpyruvic Acid by High Performance Liquid Chromatography

水助酮和烯醇类化合物互变异构反应机理的理论研究

Theoretical Studies on Isomerization Mechanism between Ketone and Enol Compounds Assisted by Water Molecules

硝基烷烃互变异构的量子化学研究

Study on quantum chemistry of nitroalkane tautomerism

观测到了酮-烯醇互变异构现象。

Ketone - enol tautomerism was observed .

分子内氢键Ⅳ.稠环芳香螯合剂的内氢键和互变异构

Intramolecular hydrogen bonding ⅳ . intramolecular hydrogen bonding of condensed aromatic chelating agents and their tautomerization

本文就不同条件下烯醇式的互变异构的相对含量作一分析。

The relative content of enol form on the different condition is analysed in this paper .

这些衍生物活性分子在生物体中存在着互变异构现象，不同的异构体有不同的生物活性，这些异构体的相对稳定性和异构体之间的相互转变对其性质具有重要的影响。

But the tautomerism of these activity thio derivatives molecular can exist in biology systems and the different tautomers have variable activity effects .

吡啶酮系偶氮染料腙式偶氮式互变异构的研究Ⅰ核磁共振波谱在构型测定中的应用

INVESTIGATION OF HYDR AZO NE - AZO TAUTOMERISM OF PYRIDONE AZO DYESTUFFS I The Application of Nuclear Magnetic Resonance For Identification of the Configurations

由于吡啶衍生物在化学和生物化学中的显著重要性，它们的醇（硫醇）-酮（硫酮）互变异构平衡已经吸引了许多实验学家和理论学家的广泛关注。

Keto-enol or thione-thiol tautomeric equilibria of pyridinol derivatives have attracted great experimental and theoretical interests due to their significant importance to chemistry and biochemistry .

对它们在不同溶剂。不同酸碱度溶液中的偶氮式及腙式间互变异构平衡进行了研究。

The tautomeric equilibrium between the azo type and the hydrazone type of these compounds in different solvents and different acidity has also been studied .

7硫代鸟嘌呤互变异构的熵效应小，对互变异构平衡没有显著的影响，而焓变对互变异构产生了主要的影响。

The entropy effect on the Gibbs free energy of 7-thioguanine base is very small and there is little significance for the tautomeric equilibria of the base .

肽在生物体系中起着十分重要的作用。肽单元的互变异构平衡现象决定着许多生物分子的结构和功能。

The peptide plays a vital role in biological systems , and the tautomerization of the peptide unit is important for the determination of structures and functions of biological molecules .

结果表明该自由基负离子在溶液中以酮-烯醇互变异构体存在，这可能是在稳定自由基中发现存在酮-烯醇互变异构平衡的首例。

It is concluded that a keto-enol tautomeric equilibrium of the amine radical anion existed in the solution , which is believed to be the first example of keto-enol tauto-merism concerning a stable free radical .