烯化

Using cobalt chloride and ferromanganese as precursor of cobalt-based catalyst, the performance of the catalyst for hydroformylation of cyclohexene was studied.

以氯化钴和锰铁合金粉为钴基催化体系的前驱体，研究了该催化剂体系对环己烯氢甲酰化反应制备环己烷基甲醛的催化性能；并考察了溶剂、温度、压力等反应条件的影响。

Secondly,a mixture of acetone and methyl formate was added into the methanol solution of sodium methoxide to prepare sodium formyl acetone by Claisen reaction.

以金属钠为原料，甲醇为溶剂，先制成甲醇钠的饱和甲醇溶液，再滴加丙酮和甲酸甲酯进行Claisen酯缩合制得丁酮烯醇钠，最后在强酸作用下与甲醇进行缩醛化反应合成了4，4-二甲氧基-2-丁酮，过程总收率达到73.1%，纯度98.7%。

The author and his colleagues have performed the experiment before the introduction of electro- philic aromatic substitution or enolate halogenation in lectures.

作者和他的团队在介绍亲电芳基取代或烯醇卤化的课程前已经进行了实验。

Theoretical investigation of the solvent effects on the mechanism of the reaction of pentafulvenone with hydrocyanic acid to produce the main product of acid of type b was carried out at B3LYP/6-311+G** level via the conductor-like polarizable continuum model.

在B3LYP/6-311+G**计算水平上，采用导体极化连续模型研究了溶剂化效应对6-亚甲基环戊二烯酮与HCN反应生成主要产物b类酸的反应机理的影响。

Theoretical investigation of the solvent effects on the mechanism of the reaction of pentafulvenone with hydrocyanic acid to produce the main product of acid of type b was carried out at B3LYP/6-311+G(superscript **) level via the conductor-like polarizable continuum model.

在B3LYP/6-311+G计算水平上，采用导体极化连续模型研究了溶剂化效应对6-亚甲基环戊二烯酮与HCN反应生成主要产物b类酸的反应机理的影响。

Bromopropane is produced from hydrogen bromide and propene in the presence of catalyst by free radical addition process.

丙烯与溴化氢在催化剂作用下，进行自由基加成反应生产1-溴丙烷。

In this paper, acrylamide-crylic acid hydrosol was synthesized by copolymerizating of acrylamide and crylic acid monomers in aqueous solution.

本文采用共聚法合成了丙烯酰胺-丙烯酸水溶胶，利用羟基化碳纳米管增加其强度和稳定性，制备成了具有温度和pH双重敏感特性的凝胶薄膜。

The calculated results shed more light on the water′s influence on the proton transfer and offer a new insight into the structural tautomer interconversion of FM.

溶液状态下的质子转移研究将会对水分子对中心分子的异构化研究提供参考，同时也部分解释了试验中酮式比例高于烯醇式的现象。

Starting with the readily available isatin, two designated key cyclization precurors 25 and 26 were synthesized respectively by 5 steps and 6 steps reactions ,with Wittig reaction and Corey-Chaykorsky reaction as key steps.

以商品可得的吲哚醌为起始原料，分别经过5步和6步以Wittig烯烃化，Corey-Chaykorsky反应为关键步骤的合成路线，得到2个用于的环合反应的前体亚胺25和26。

Exxpro specialty elastomers are brominated polymer s derived from a co polymer of isobutylene and paramethylstyrene.

Exxpro特种弹性体是一种溴化聚合物，由异丁烯和对甲基苯乙烯共聚物制得。

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。