烯烃

The alkylation of benzene with long-chain olefins has been performed in the presence of ionic liquid, the reaction conditions are optimized.

研究了离子液体催化苯与烯烃的烷基化，考察了反应条件对烷基化反应的影响。

But with its buyout by BP Amoco, Castrol may have to re-evaluate the components of its formulation relative to the value of supply chain.

但其收购的BP阿莫科，嘉实多，可能必须重新评估其组成部分制定相对于供应链价值。BP一直较大的炼油厂和烯烃生产商。

Toward this end, the olefin 51 was treated with cyanogen azide and, indeed, produced the ring expanded ketone 52

为了证明这一看法，他用氰化迭氮处理烯烃(51)就得到扩大的环酮。

The product of propane gas chromatography, second is the highest percentage of butane and isobutane is, The content of olefins are relatively low.

气相产物中丙烷的百分含量最高，其次是正丁烷和异丁烷；烯烃的含量均较低。

The alkylation of isobutane with butene is very important for the production of reformulated gasoline;however,the severe equipment corrosion and environmental hazards are involved in the current alkylation technology.Therefore,some novel alternative technologies are desired.

异丁烷和烯烃烷基化反应对新配方清洁汽油的生产具有重要意义，而目前的烷基化工艺存在严重的设备腐蚀和污染问题，因此亟需新的替代工艺。

On the basis of aerobic oxidation ofβ-ionone catalyzed by supported catalysts/butyraldehyde system,a series of cycloolefines such as cyclohexene,β-methylionone,α-ionone,andα-pinene were oxidized under the general conditions to give corresponding epoxides and allylic oxides.

将三种催化体系CMPS-Co_2/正丁醛、Co_2/SiIm-正丁醛、MoO_2_2/SiIm-正丁醛推广应用到不同环烯烃催化氧化反应，虽然各反应底物之间的转化率和氧化选择性变化很大，但对三种催化体系横向比较而言，其催化氧化情况相当。

Studies on olefin-coordinating transition metal carbene complexes II.

含烯烃配体的过渡金属卡宾配合物的研究II。

Studies on olefin-coordineting transition metal carbene complexes XVI.

含烯烃配体的过渡金属卡宾配合物的研究 XVI。

This thesis consists of three main parts of the research work on the syntheses, structures and reactivities of the olefin-coordinated transition metal carbene and carbyne complexes. In chapter 1, on the basis of our previous research works on the reacitivites of the cationic carbyne complexes of transition metals with metalcarbonyl anions, we explored the reactions of the cationic carbyne complexes of manganese (1) and rhenium (2) with polymetalcarbonyl anions, and developed a new method for the preparations of heternuclear trimetal bridging carbyne complexes.

本论文对烯烃配位的过渡金属卡宾和卡拜络合物的合成、结构和反应性能进行了研究，主要进行了如下三方面的工作：第一章在本小组过去的研究基础上，进一步考察锰和铼的阳离子卡拜络合物1和2与羰基金属阴离子化合物的反应，用来合成异核多金属桥卡拜络合物，发展合成多金属桥卡拜络合物的新方法和新路线。

Propyleneoxide is produced with chlorohydrin method or Halcon method which gives rise toenvironmental pollution or a large amount of co-product.

是最洁净、廉价的氧源，但工业上除乙烯外，其它环氧化合物还不能通过〓直接高选择性环氧化相应的烯烃制得。

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。