烯

The catalyst was applied to hydrogenateα-octene in normal temperature and pressure, the conversion ofα-octene was 98.6%, and the yield of octane was 63.1% by the bimetallic catalyst.

CTS-ACRPd用于常温常压下α-辛烯的催化氢化，并在催化氢化过程中添加Ni~(2+)，Ni~(2+)-pd双金属催化剂催化α-辛烯的加氢反应150 min时α-辛烯的转化率为98.6%，正辛烷产率63.1%。

Enaminones are also valuable precursors for α-iodol enaminones, 3-amino sugar derivatives, azo-compounds,β-aminoketone, as well as tetrahydropentalenes, tetrahydroindenes, and hexahydroazulenes.

烯胺酮类化合物同时也是α-碘代烯胺酮类化合物、3-氨基糖衍生物类化合物、氮杂化合物、β-氨基衍生物类化合物和四氢并环戊二烯类化合物和四氢茚类化合物的重要前体。

Selective oxidation of isobutylene to methacrolein is a key step in the production of methyl methacrylate from isobutylene.

异丁烯选择氧化制备甲基丙烯醛是异丁烯法制备甲基丙烯酸甲酯的关键步骤。

By analyzing the mechanism of isobutylene polymerization, a new catalyst for synthesis of highly reactive polyisobutylene from mixed C4 fraction was prepared.

在分析聚异丁烯聚合机理的基础上，进行了合成高活性聚异丁烯催化剂的研究，研制出了一种适用于利用混合碳四合成高活性聚异丁烯的催化剂体系，并探索了聚合反应规律。

In the part of preparing HMT, the thesis did research on the preparing process of using isobutylene , 2,3-dimethyl-butene-l , 2,3-dimethyl-butene-2 as the materials respectively .

在中间体合成部分，本文分别对新己烯、2，3—二甲基—丁烯—1、2，3—二甲基—丁烯—2为原料合成HMT的工艺进行了研究，然后利用GC-MS对三种原料合成HMT的主要副产物分别进行了分析。

Result showed that conversion of isobutylene reached 80% and selectivity of diisobutylene was 90% when reacted at 180 oC with mass airspeed of 3h-1 by self-made R2 catalyst.

利用分子筛催化异丁烯合成二聚异丁烯，在固定床反应器中考查了温度、空速对异丁烯齐聚反应的影响。

In the part of preparing HMT, the thesis did research on the preparing process of using isobutylene , 2,3-dimethyl-butene-l , 2,3-dimethyl-butene-2 as the materials respectively .Then using GC-MS , the main outgrowths in each reaction systems were analyzed.

在中间体合成部分，本文分别对新己烯、2，3—二甲基—丁烯—1、2，3—二甲基—丁烯—2为原料合成HMT的工艺进行了研究，然后利用GC-MS对三种原料合成HMT的主要副产物分别进行了分析。

The concentrations of isopentane, 2-methyl-pentane, pentane and 3-methyl-pentane which are from automobile exhaust and gasoline evaporation were highest in alkanes. Benzene/toluene ratio was close to 0.5 which is the characteristic value of automobile exhaust. The concentrations of pinene and isoprene were highest in alkenes.

烷烃类物质中异戊烷、2-甲基戊烷、正戊烷和3-甲基戊烷等机动车尾气或汽油挥发特征性物质浓度最高；芳香烃类物质中苯／甲苯的特征比值略高于机动车尾气排放特征比值0.5；烯烃类物质以植物排放的蒎烯、异戊二烯为主。

From the view of structure,α-alkenoyl ketene dithioacetals contain divinyl ketones.

从结构上看，α-烯酰基二硫缩烯酮可以看作二烯酮类物质。

In the end, a Novel and facile method has been used to synthesize functionalized cyclopentadienes by Nazarov cyclization ofα-alkenoyl ketene dithioacetals under Vilsmeier conditions.

从合成的α-烯酰基二硫缩烯酮类化合物出发，经过Vilsmeier试剂作用下的Nazarov环合反应，合成了官能化环戊二烯类化合物。

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。