互变异构体

GC-MS分离鉴定3-氧代戊酸甲酯的互变异构体

Separation and Identification of Enol-keto Tautomers of Methyl 3-oxo Pentanoate by GC-MS

这可能是由于这些化合物存在互变异构体所致。

Presumably these are caused by the existence of tautomeric forms .

荧光素钠互变异构体的表面增强共振喇曼散射光谱

Surface-enhanced resonance Raman scattering spectra of sodium fluorescein with different tautomers

烯醇式互变异构体的含量分析

The Content Analysis of The Enol Form Tautomerism

4-硫尿嘧啶互变异构体的密度泛函理论计算

Density Functional Theory Calculation on 4-Thiouracil Tautomers

一化合物，在溶液中存在酮式与烯醇式互变异构体，普通液相柱中能否分开？

It does not make any sense that trying to separate the tautomers of enol and ketone .

确定了互变异构体及过渡态的几何构型、相对能量和活化能。

The geometries , relative energies , and activation energy of the tautomer and transition state were determined .

本文兼用分子力学和量子化学计算讨论了互变异构体对磁交换作用的影响。

The effect of tautomeric isomeride on magnetic interaction was discussed by molecular mechanics and CNDO / 2 methods .

结果表明，合成的化合物具有醇亚胺和酮胺互变异构体结构，锡原子是五配位的，存在着分子间酚羟基（酮羰基）氧原子同锡原子的配键。

The results of the studies indicate that the tautomeric equilibrium between the enol imine and keto enamine exists in the compounds .

还对分子内的受阻旋转、活泼氢状态以及互变异构体的动力学现象作了讨论。

The states of active hydrogens , the hindered rotation within molecules and the kinetic phenomena of tautomerism have also been discussed .

结果表明：顺铂的键连引起了互变平衡的变化，但是各互变异构体之间的相对稳定性顺序并没有改变。

The results demonstrate that the platinum adducts influence moderately on tautomeric equilibrium , but do not change the relative stability of tautomers whether in gas phase or in aqueous solution .

采用BH-HLYP/6-311+G方法对10种气相和水相中可能存在的5-氟胞嘧啶互变异构体进行了几何全优化，并计算出它们的总能量和吉布斯自由能。

The preference conformations of 10 possible tautomers of 5-fluorocytosine were calculated by the BH-HLYP / 6-311 + G method , in both the gas and aqueous phases , with full geometry optimization .

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 .

色谱可以用来分离互变异构体，质谱法被证实是研究气相物质互变最有效的手段之一，因此，将色谱与质谱结合起来将是研究气相体系互变异构的好方法。

The ability of separation of tautomers by gas chromatography ( GC ) has been reported , and the mass spectrometer ( MS ) has been proved to be one of the most informative and practical method for studying tautomers in gas phase .