互变异构

The investigation into simulation and experiment of IR spectra indicates that there exists no azido-tetrazole tautomerism in solid DAT.

计算模拟IR光谱和实测IR光谱的对比表明DAT在固态下不发生叠氮-四唑互变异构反应。

The tautomerism of neutral cytosine in gas phase was investigated byB3LYP/6-311+G** method.

利用密度泛函理论的B3LYP/6-311+G~方法，研究了胞嘧啶分子的互变异构化现象。

The reaction mechanism of thione-thiol tautomerism for 2,6-dithiopurine obtained from proton transfer has been investigated by DFT B3LYP method with 6-311 ＋G basis set.

采用密度泛函B3LYP方法，在6-311＋G基组水平上对2，6-二巯基嘌呤质子转移引起的硫醇式与硫酮式互变异构反应进行了计算研究。

In poly the chain scission is based on the ozone oxidation of the alcoholic groups of PVAL with formation of ketone groups which in turn are the source of a ketoeenol tautomerism which leads to random chain scission by further ozone attack.

聚乙烯醇的乙醇基在臭氧的氧化作用下形成酮基，并依次成为酮烯醇互变异构现象的源头，在臭氧的进一步攻击下导致链无规则断裂，从而产生断链作用。

Understand keto-enol tautomerism, reactivity of enolate ions.

A5 E3J3 了解酮－烯醇互变异构性，烯醇离子的反应性。

Keywords monochalcogenocarboxylic acid;monochalcogenosilanoic acid;supramolecular/continuum model;tautomerism;proton transfer;bond dissociation energy

Article From 四川大学；物理化学硕士论文 2007年度单氧代羧酸；单氧代硅酸；超分子-连续介质模型；互变异构；质子转移；键解离能

Master the Keto-Enol tautomerism; reactions of enols:α-H substitution reactions;α-halogenation of aldehydes and ketones;α-bromination of carboxylic acids; acidity ofα-H atoms: enolate ion formation; reactivity of enolate ions; alkylation of enolate ions; mechanism of carbonyl condensation reactions;condensations of aldehydes and ketones: the Aldol reaction; dehydration of Aldol products; the Claisen condensation reaction; the Michael addition.

熟练掌握酮式－烯醇式互变异构；烯醇的反应：α-H的活性；醛酮的α卤代反应；羧酸的α-溴代反应；α-H的酸性：烯醇负离子的形成；烯醇负离子的反应；烯醇负离子的烃基化；羰基化合物的缩合反应机理；醛酮的缩合反应－Aldol缩合；Aldol缩合产物的脱水反应； Cleisen 酯缩合反应；麦克尔加成反应。

These results show that the He-Ne Laser may cause tautomerization in the bases.

实验结果提示，He一Ne激光有可能使碱基发生互变异构。

All of this differences for spectra, especially the behavior of negative solvato-chromism in polar solvents, and the effect of pH value on the tautomerization of compound have been discussed in detail.

对出现这种差异，特别是负的溶致变色行为和在不同pH条件下分子的互变异构等对吸光谱的影响进行了讨论。

However, the real advantage of using protected enamines is that they allow the preparation of unsubstituted poly derivatives, upon deprotection, while avoiding tautomerization.

然而，真正的优势，使用保护enamines的是，他们让编写unsubstituted聚的衍生工具，后脱，同时避免互变异构。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！