环烯

In this paper, a series of 4,5-dithiacrown ether annulated 1,3-dithiole-2-thiones 8a~8d were prepared via condensing 4,5-bis-1,3-dithiole-2-thione (7) with 1,ω-dimercapto polyglycol derivatives in high dilution. The obvious template effect was found during the synthesis of 8c-8d.

在高度稀释条件下，经4，5-二溴甲基-1，3-二硫杂环戊烯-2-硫酮(7)和多缩乙二醇的1，ω-二巰基衍生物的缩合反应，方便地合成了4，5-位带二硫杂冠醚残基的2-硫代-1，3-二硫杂环戊烯的衍生物8a~8d，中间体硫杂冠醚8c~8d的合成中有明显的&模板效应&。

It was found that the reactions of C_(60) with anthranilic acids and isoamyl nitrite in the presence of triethylamine unexpectedly afforded C_(60)-fusedδ-lactones,which would be difficult to be prepared by other known methods.

通过在三乙胺作用下，富勒烯与邻氨基苯甲酸类化合物和亚硝酸异戊酯的环化反应，首次合成了一系列富勒烯并六元环内酯。

Effects of different additives such as sulfurized olefin,mixtures of amine phosphates,ester thiophosphates,N-containing agents and ashless rust-resistant agents on the emulsion stability ,EP/AW properties and rust-resistance of industrial gear oil were studied.

研究了硫化烯烃、磷酸酯胺盐、硫磷酸酯极压抗磨剂，含氮杂环衍生物多功能添加剂和防锈剂等，对工业齿轮油抗乳化性能、极压抗磨性能、防锈性能的影响；以及硫化烯烃、磷酸酯盐极压抗磨剂与含氮杂环衍生物多功能添加剂之间的协和效应。

Compounds were determined from more than 3 stages, including germacrene D, caryophyllene, phenol, 2, 6-bis (1, 1-dimethylethyl)-4-methyl-,β-elemene,γ-elemene, 1-octanol, 2-butyl-, dibutyl phthalate, cyclohexane, 1-ethenyl-1-methyl-2-(1-methylethenyl)-4(1-methylethylidene)-and butyl caprylate.

其中，3个时期以上能检测到相同的化学成分有9种，分别是大牻牛儿烯D、丁香烯、2，6-二叔丁基－4-甲基苯酚、β-榄香烯、γ-榄香烯、2-丁基－1-辛醇、邻苯二甲酸二丁酯、1-乙烯基－1-甲基－2-（1-甲基乙烯基）－4-（1-甲基亚乙烯基）环己烷和辛酸丁酯。

Great progress in benzene selective hydrogenation to cyclohexene has been made in recent years. So it was very important for research and development of its downstream products.

摘 要：近年来我国在苯选择加氢制取环己烯的研究领域取得了很大的进展，环己烯下游产品的开发研究具有十分重要的意义。

Selective hydrogenation of benzene to cyclohexene over Ru is the best method to obtain cyclohexene.

苯选择加氢合成环己烯的方法是大批量获得环己烯的最佳方法。

The background of developing catalytic technology for partial hydrogenation of benzene to cyclohexene and the progress in its investigation at home and abroad are introduced briefly.

简要介绍了苯部分加氢制环己烯催化技术的开发背景，国内外相关领域的研究进展，比较了不同的工艺路线，展望了环己烯的应用前景。

The preparation and characterization of a novel Ru-Zn catalyst for selective hydrogenation of benzene to cyclohexene have been carried out in this paper.

苯选择加氢制环己烯具有原子经济性和环境友好等特点，开展苯选择加氢制环己烯催化剂的研究具有重要的应用价值和一定的学术意义。

The catalytic performance of a series of supported KNO3 solid bases for the synthesis of methylcyclopentadiene via cyclopentadiene methylation with methanol was investigated.

考察了负载型KNO3固体碱对环戊二烯和甲醇的甲基化制备甲基环戊二烯反应的催化性能。

Di-cyclopentadiene deserves to be mentioned for its simple decomposed product,cyclopentadiene,and its low-price.

尤其是双环戊二烯的分解产物单纯，仅有解聚后的环戊二烯一种，且价廉、易得，值得重视。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。