反应中间体

根据我们得到的数据，我们认为其重要的反应中间体羟乙基硫胺素焦磷酸（HEThDP）除文献报道的烯铵结构和C2α-碳负离子结构之外，还存在第三种共振结构，即烯醇式结构。

Based on the data we got , we believed that there should be a third resonant structure of the reaction intermediate hydroxyethyl thiamine pyrophosphate ( HEThDP ) besides the reported enamine resonant structure and C2-a-alkenyl carbanion resonant structure , which might be named enol resonant structure .

烯胺是一类重要的反应中间体，其在有机合成中有着广泛的应用。

The enamine is a type of important reaction intermediate , it has an extensive application in organically synthesize .

含氟双环内酯反应中间体及产物的NMR研究

NMR studies on reaction intermediates and products in chemical reactions involving fluorine-containing lactones

多元羧酸与木材交联作用的反应中间体I.多元羧酸的空间效应和化学结构

THE INTERMEDIATE OF CROSSLINKING REACTION BETWEEN WOOD AND POLYCARBOXYLIC ACIDI . Space Effect and Chemical Structure of Polycarboxylic Acid

呋喃酮类香料合成及Maillard反应中间体与半胱氨酸模型体系的研究

Study on Synthesis of Furanone Flavors and Maillard Intermediates-Cysteine Model System

各步反应中间体及终产品的结构用MS、1HNMR和13cNMR鉴定。

The structures of the step-by-step intermediates and the final products have been identified by MS , 1H NMR and 13C NMR .

计算结果表明，随着合金中Fe含量的增加，甲烷解离的反应中间体的吸附会逐渐增强，有利于表面碳原子的形成。

The calculated results show that , with the increase of the Fe content , the adsorption of the reaction intermediates involved in methane dissociation is strengthened , which facilitates the formation of surface C atoms .

并采用FTIR和1HNMR表征了各反应中间体、单体以及聚合物的结构，利用凝胶渗透色谱（GPC）测定了所合成聚合物的分子量及分子量分布。

The structures of the intermediate , monomers and corresponding polymers were characterized by elemental analysis , FTIR and 1 H NMR . Molecular weight and MW distribution were calculated by gel permeation chromatography .

在B3LYP／6-31G（d）水平下，对催化剂、反应中间体和过渡态的结构进行了全优化，并对所有结构进行了振动分析。

The catalyst and all the structures of the intermediary and the transition states for this alkynylation are optimized completely at the B3LYP / 6-31 G ( d ) level .

CIDEP为光物理和光化学过程提供了大量的信息，是研究反应中间体、电子转移和能量转移等的有效手段之一。

CIDEP can give us more information about photochemical and photophysical processes and it is a useful method to study intermediate species , electron transfer and energy transfer mechanisms in reactions .

反应中间体和产物均通过核磁共振氢谱、傅里叶红外光谱、电喷雾质谱等分析手段进行了结构鉴定。

The chemical structures were characterized by FT-IR , 1H-NMR and ESI-MS methods .

而作为反应中间体，其稳定性非常重要。

And as reaction intermediates , its stability is very important for reactions .

这可能是由于反应中间体的稳定性不同所致。当自由基在向其它物质进攻时，控制反应速度的决定因素是反应中间体的稳定性，共轭程度越大中间体越稳定，则反应速度就越快。

This is because the stability of reactive intermediates differ from each other .

卡宾自被确认为是一种反应中间体后，就在有机化学中扮演着重要的角色。

Carbenes play an important role in organic chemistry , since it be determined intermediate .

目前大部分研究是通过实验检测到的反应中间体来推测甲醇的脱氢历程。

In recent years , intensified research focuses on intermediates to speculate methanol dehydrogenation step .

有机化学反应中间体、过渡态及反应途径的理论研究现状

The present status of the theoretical study of intermediate , transition state and reaction path of organic reaction

杂环烯酮缩胺是一类在有机合成方面有价值的多官能团反应中间体。

The structure of heterocyclic ketene aminals is peculiar and notable which possesses a large conjugation system in its molecule .

介绍了利用金属离子的配位作用捕获并分离重要有机反应中间体&自由基中间体的研究方法和最新进展。

Methods and recent development of isolation of structurally characterizable alkali , alkaline earth and lanthanide metal ketyl radical complexes were reviewed in the paper .

淀粉系高吸水性树脂反应中间体稳定性及反应活性的量子化学研究水溶液法合成丙烯酸系高吸水性树脂

Quantum Chemistry Study on Stability and Reactivity of Reactive Intermediate of Starch Super-water-absorbent Resin Synthesis of super absorbent polymer of acrylic acid series by means of aqueous solution polymerization

O+HO2→OH+O2和N+HO2→OH+NO反应中间体和过渡态结构的从头计算研究

AB Initio Study of the Structures of the Intermediates and Transition States for the Reactions O + HO_2 → OH + O_2 N + HO_2 → OH + NO

离子液体的咪唑阳离子对金属中心的弱配位性及离子液体的极性均有利于稳定催化反应中间体，提高了催化剂的催化活性及稳定性。

It was found that weak complexation between the imidazolium cations and meter centre of phosphotungstic acid and polarity of the ionic liquid moieties are conducive to stabilizing reaction inter-mediate .

通过瞬态吸收光谱、激发态或自由基浓度等参量随时间的变化所提供的信息，便可以了解到光化学反应中间体的特征和动态特性。

The properties and dynamic characteristics of transients in photochemical processes could be obtained via transient absorption spectra and the change of transients ' concentration accompanied with the change of time .

它被用来将一类被称作羧酸的化合物，转化成另外一类活性很高的反应中间体，也就是酰氯。

And what it 's used is to convert one type of group , what 's called a carboxylic acid into another type of very reactive intermediate , which is called an acid chloride .

反应的中间体CH2在星际空间里起着非常重要的作用。

In the interstellar medium , CH2 plays an important role in the carbon chemistry .

动力学分析方法检测酶反应活性中间体的研究

Studies on Kinetic Method for Detecting Active Intermediate in Enzyme Reaction

动力学分析法研究生物反应活性中间体及其相关反应

Kinetics Analysis of Active Intermediate Species and Its Relative Reaction in Biochemical System

质谱法研究有机反应活泼中间体

Mass Spectrometric Study on Reactive Intermediates of Organic Reactions

路线二经过溴化、脱水、酯化、取代、水解反应得到中间体；

The first route was carried out by bromating , dehydrating , replacing reaction .

这是一种非常容易反应的中间体。

This is the very reactive intermediate .

有机反应活性中间体&苯炔

Reactive intermediate in organic reactions & benzyne