双烯

Using density functional theory, the rearrangement of butene double bond catalyzed by a 3T cluster model of zeolite was investigated.

基于含有两个Si和一个Al的分子筛3T簇模型，利用密度泛函方法研究了分子筛催化1-丁烯双键异构为cis-2-丁烯的反应机理。

The crosslinked rubber with dicyclopentadienecrosslinkage was prepared by the reaction between the chlorohydrin rubberand the cyclopentadienyl sodium.

以环戊二烯基钠与氯醇橡胶反应，制得了含CPD侧基和双环戊二烯交联的聚合物。

This invention applies mild condition uses substituent group triphenylamine aldehyde or triphenylamine dialdehyde as raw material to react by heating with 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group to produce the intermolecular charge transfer chromogen with high decomposition temperature, non-coplanar structure, and triphenylamine group.

本发明采用温和的手段，将取代基三苯胺单醛或取代基三苯胺双醛为原料与2-(3，5，5-三甲基环己烯-2-烯亚基)丙二腈共热生成具有高的热分解温度、非共平面空间结构的含三苯胺基团的分子内电荷转移生色团。

The present invention relates to olefin processing technology, and is especially double active component Mn-Ag deoxidizer for deoxidizing olefin and its preparation process and application.

本发明涉及烯烃加工领域，具体涉及用于烯烃脱氧的Mn-Ag双活性组分脱氧剂及其制备方法和应用。

"Olefins may be classified by whether the double Bond is in a ring or a chain or by the number of double Bonds (monoolefin, diolefin, etc.)."

有两种分类方法︰一、分为环烯烃和非环烯烃，双键依次位于成环碳原子之间或开链基团的碳原子之间。

In this thesis, monomer with unsaturated double bond was firstly synthesized byreacting acryloyl chloride with bifunctional monomer. Such synthesized monomer ormonomer with initial unsaturated double bond was used to prepare linear polymericmaterials by free radical polymerization. A series of new degradable space polymerswith acylamino bond were subsequently synthesized using diisocyanate as thecross-linker.

本文首先通过丙烯酰氯和双官能团单体反应引入不饱和双键，或者直接使用具有不饱和双键的单体，通过自由基聚合得到含有活泼羟基或氨基的线型高分子聚合物，再用二异氰酸酯作为交联剂交联，从而合成了一系列基于酰胺键的新型可降解高分子体型聚合物。

Dicyclopentadiene ; Cyclopentadiene ; Raney Nickel ; Liquid hydrogenation ; Cyclopentene

双环戊二烯；环戊二烯；骨架镍；液相加氢；环戊烯

Three new ferrocenylmethyl-substituted indenes and cyclopentadienes were synthesized by the addition of hydrogen anion and carbon anion to fulvene and benzo fulvene respectively, moreover, their structures were characterized by NMR and MS.

本文以二茂铁基富烯和二茂铁基苯并富烯为前体，通过负氢和负碳对双键的加成，合成了3个新型的二茂铁基甲基取代的茚及环戊二烯，并对其结构进行了核磁及质谱表征。

The results showed that silver ion can complex with segregative carbon-carbon double bonds in DHA ester, with isolated C=C bonds in allyl ether and with conjugate C=C bonds in benzene individually.

研究结果表明，银离子可以与DHA乙酯的隔离碳—碳双键、烯丙醚的孤立碳—碳双键及苯的共轭碳—碳双键形成络合物。

The results of IR and DSC indicated that the curing reaction of BMI-modified phenolic resin mainly consists of two steps: the allyl groups in the Novolak resin react with maleimide group via"Ene"addition, and addition reactions of the C=C bonds formed thereby are followed.

IR与DSC方法研究表明：BMI改性酚醛树脂的固化反应主要是Novolak树脂上的烯丙基首先与酰亚胺基团的烯加成反应，然后烯加成反应所形成的C=C双键发生进一步加成。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。