碳碳双键

Wittig反应是合成碳碳双键的一个十分重要的方法，被广泛地应用于天然产物和有机中间体的合成中。

Wittig reaction is a valuable method to form the carbon-carbon double bond , which is widely used in total synthesis of natural products and organic intermediates .

比较碳碳双键与叁键中各键的强弱

Compare all the Bonds Strength in Carbon-Carbon Double Bond and Carbon-Carbon Triple Bond

“蜡是一种复杂的混合物，但其内部也存在聚乙烯中的基本键——碳碳双键，”她解释道，“而蜡螟蠕虫进化出了一种方法或系统来破坏这种键。”

＂ Wax is a complex mixture , but the basic bond in polyethylene , the carbon-carbon bond , is there as well , ＂ she explains , ＂ The wax worm evolved a method or system to break this bond ．＂

C（60）是高度共轭的笼状结构的碳素体，分子结构中六边形环间的共价碳碳双键是富电子区，反应性能与烯烃有类似性，主要表现为双键加成。

C_ ( 60 ) is one kind of fullerene with high conjugated cage-types structure . Its covalence between two hexagons has high reactivity , which behaves as addition reaction of double bond .

解析脂肪酸2-氨基-2-甲基丙醇衍生物的EI质谱图，确定了马齿苋脂肪酸中碳碳双键位置。

The position of double bonds of the fatty acids form purslane was located by analyzing electron impact mass spectra of 2-amino-2-methylpropanol derivatives of the fatty acids .

Wittig反应是有机合成中用于形成碳碳双键最重要的反应之一。

The Wittig reaction is one of the most import reactions employing for the construction of carbon-carbon double bounds in organic synthesis .

甲基丙烯酸环氧丙酯（glycidylmethacrylate，简称GMA），是丙烯酸酯胶的主要组分，含有碳碳双键和环氧基团，可参与离子型和自由基型反应，具有高反应活性。

Glycidyl methacrylate ( GMA ) is the main component of acrylic plastic , which contains double carbon bonds and expoxy clusters , and could participate in ionic and radical reaction with high activity .

邻氨基苯酚将脂肪酸羧基修改为含氮杂环，使在EI源中避免了链烯基中碳碳双键的移动。

Ortho aminophenol was developed for chemical modifying reagent of fatty acids so as to modify carboxyl group into nitrogen containing heterocycle which effectively suppresses the migration of double bonds of the alkenyl under the electron impact source .

用紫外光曝光、FT-IR跟踪碳碳双键含量变化的方法测试并证实了改性树脂具有优良的光敏性：紫外光曝光5s后，双键反应程度达50%以上；

The detection with UV exposure and FT IR tracking variation of carbon carbon double bonds proves that the product has a high photosensitivity . More than 50 % of carbon carbon double bonds can be reacted after 5 seconds of UV exposure .

通过解析不饱和脂肪酸2-氨基-2-甲基丙醇化学修饰产物的EI质谱图，得到了不饱和脂肪酸中碳碳双键的定位规则，从而为分析不饱和脂肪酸精细结构提供了手段。

The empirical rule governing the position of double bonds in olefinic acids was referred to by analyzing electron impact spectra of the chemical products modified by 2-amino-2-methylpropanol of the fatty acids . This method provides a new technical tool for analyzing fine structures of unsaturated fatty acids .

碳碳双键和叁键加成差异的探讨

The Approach of Addition Difference Between Double and Triple Bonds of Carbon

碳碳双键广泛地存在于功能有机分子中，其构筑在合成化学中具有极其重要的意义.Ramberg-B？

It is important to construct carbon-carbon double bond skeleton in the organic synthesis using Ramberg-B ?

油脂碳碳双键加氢高活性镍催化剂的研究

Study on Some Highly Active Ni Catalysts for Hydrogenation of Carbon-Carbon Double Bond in Food Oils

Pd&SnO2/D3520催化剂上碳碳双键化合物催化加氢活性与取代基性质的相关性

Relativity of the catalytic hydrogenation activity of the olefins and the substituents constant on pd - sno_2 / d3520 catalysts

其光谱数据和理化性能与文献报道一致，制得的氧化剂应用于一系列天然化合物的碳碳双键环氧化反应，取得较好结果。

The dioxirane was successfully applied to the epoxidation reactions of some natural compounds with carbon - carbon double bonds .

利用含有碳碳双键的有机硅氧烷与其他有机硅单体聚合，制得聚硅氧烷乳液；

At first , polysiloxane emulsion was synthesized by polymerization with organosiloxane contained carbon-carbon double bond and uther organosiloxane monomers .

第二章研究了通过二碘化钐促进的还原消除反应构建碳碳双键的策略。

Chapter two describes a new strategy to form carbon-carbon double bonds via the reductive elimination reaction promoted by samarium diiodide .

在烯烃的顺式与反式异构体中，处于碳碳双键两端的顶点间的距离是不同的。

The distances among the vertices spaced by the double bond are different in the cis-alkenes from those in its trans-isomers .

催化氢转移还原法是一种温和、方便、经济，选择性高的还原碳碳双键的方法。

Reduction of catalytic hydrogen transfer is a mild , convenient , economical , selective system for the reduction of carbon-carbon double bonds .

关环转换反应是形成碳碳双键的重要反应之一，即双烯化合物在金属碳烯催化下关环得到环烯类化合物。

Ring closing metathesis ( RCM ) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene .

除了可能的碳碳双键插入反应机理以外，我们还发现了烷基碳加成-消除和端基氧加成-消除机理。

Except for the carbon-carbon double bond insertion mechanism , we also discover the other two mechanisms : olefinic carbon addition-elimination mechanism and side oxygen addition-elimination mechanism .

为研究硼氢化钾还原α，β-不饱和硝基化合物时对于碳碳双键的选择性，以β-硝基苯乙烯为底物，考察了反应条件及烯键和苯环上取代基对于反应结果的影响。

β - nitrostyrene was used as a model compound of β - nitroolefines in the study of the selective reduction of carbon-carbon double bond with potassium borohydride .

让我们来看一看碳碳双键的情况，例如在乙烷里，我们有个双键。

So let 's take a look at what actually happens if we 're talking about a carbon-carbon double bond , we 're going to have a double bond .

结果表明：在此条件下加氢，产物碳碳双键含量减少，其综合性能特别是高温耐氧化性得到了显著提高。

The result shows that under the optimal conditions , the content of double carbon bond in product reduced , and the comprehensive properties , especially , the oxidative resistance improved greatly .

缩合反应是有机合成的重要反应之一，它在构建具有生物活性的杂环化合物以及形成碳碳双键等反应中起着举足轻重的作用。

Condensation is one of important reactions in organic synthesis . It play a key role in synthesizing heterocyclic compounds due to their important performance in a variety of disciplines and forming carbon carbon double bond .

经开环易位聚合后的聚合物主链上仍保留不饱和的碳碳双键，构成了其独特的微结构，如双键顺反比例及立构规整性等。

When ROMP of monomers occured , the unsaturated carbon-carbon double bond could remain in the main chain of polymers , constituting its unique microstructure , such as trans / cis ratio of double bond and tacticity .

在第四章，主要重点研究通过碳碳双键构建萘醌类共轭体系，设计和合成二种萘醌非偶氮染料，探索丰富染料色谱和改善染色性能的有效途径。

Based on the study of building conjugated systems through carbon-carbon double bonds , two types of naphthoquinone colours were designed and synthesized . The effective methods to enrich colour chromatography and to improve dyeing properties were developed .

将改性纤维添加到纸浆，运用交联湿强原理即碳碳双键通过自由基聚合在纤维间交联而增加了纤维间的结合力，并阻止纤维的吸水润胀，从而保持纸张湿强度。

The modified fibers were added to the pulp the carbon-carbon double bond by free radical polymerization between the fibers to form crosslinked network structure , and prevent the fibers swell , thus improve the wet strength of paper .

研究其催化植物油脂中碳碳双键环氧化性能，并进行重复试验，得到负载后催化剂的催化效果虽然转化率低于负载前，但是选择性升高。

We explore their catalysis performance on epoxidation of carbon-carbon double bonds in vegetable oil and carry out repeat experiments . Though the conversion rate of the immobilized catalyst was lower than the catalyst without being immobilized , the selectivity increased .

辅酶NAD（P）H模型还原碳-碳双键化合物反应机理研究

On the Mechanism of Reduction of Ethylenic Compounds by NADH Models