查询词典 toluene

The ligand of the chiral Schiff base and acetylacetone vanadium are subjected to complexation in situ, hydrogen peroxide is taken as an oxidant, aryl alkyl thioether asymmetric oxidation reaction is catalyzed in a toluene or dichloromethane solution under low temperature or room temperature, enantioselectivity of chiral sulphoxide is 72 percent to 95 percent ee, and yield is 42 percent to 83 percent.

将上述手性西佛碱配体与乙酰丙酮氧钒原位络合，采用双氧水为氧化剂，在甲苯或二氯甲烷溶液中低温至室温下催化芳基烷基硫醚不对称氧化反应，手性亚砜的对映选择性为72％-95％ee，产率为42％-83％。

Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1, 3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts were synthesized. Then dual-functionalized ionic liquids containing both hydroxyl and sulfonyl functional groups were produced successfully by zwitterionic salts and three kinds of strong acids (p-toluene sulfonic acid, trifluoromethanesulfonic acid, methanesulfonic acid) respectively. The structure of zwitterionic salts and dual-functional ionic liquids were confirmed by the 1H NMR and IR.

以羟基有机胺(N，N-二甲基乙醇胺，三乙醇胺)为原料与1，3-磺酸内酯反应合成了一系列含有羟基和磺酸基双官能团的内盐，并将所得到的内盐分别与三种强酸(对甲苯磺酸，三氟磺酸，甲磺酸)反应，成功地合成了双功能化室温离子液体，并通过红外光谱、核磁氢谱测定，证实了内盐和双功能化离子液体的结构。

In the first part of the dissertation,the basic knowledge of methanol market、toluene oxidation technology、the clear electrochemical organic synthesis technology and the solid superacid were introduced and reviewed.

本文的第一部分对甲醇的市场概况、甲苯催化氧化技术概况、清洁的电化学有机合成技术概况以及固体超强酸概况进行了文献综述。

In the third chapter, the photoabsorption of NO, CO, acetonitrile, acrylonitrile, benzene and toluene of benzene series have been measured by using a homemade experimental apparatus of cylindrical multi-stage ion chamber with high flux SR source. The ionization energies of some electron states are given. Their superexcited states, autoionization Rydberg states have been analyzed. By the analysis and comparison, our results are accurate and credibility.

在第三章中，利用高通量的同步辐射光源和自制的多级光电离吸收池装置，测量了NO、CO、乙腈、丙烯腈、苯系物中的苯和甲苯的光吸收谱，给出了部分电子态的电离能，分析了其中的自电离Rydberg态结构和一些振动能级，对部分结构做了精确指认，经过分析和比较，我们所得的结果比较精确和可靠。

In this paper,the toluene -2,4-diisocyanate and trimethylol-propane are usedto synthetize curing agent for polyurethan.

本文用2，4－甲苯二异氰酸酯和三羟甲基丙烷为原料合成聚氨酯固化剂，用该固化剂固化含羟基的树脂。

Highly toxi c solvents benzene,tetrachloromethane,methanol were replaced by toluene,1,2-di c hloroethane,ethanol in the course of reaction and purification.

甲基 2 ，1，3 苯并噻二唑的溴化改在低毒性的 1，2 二氯乙烷中进行，革除了高毒性的四氯化碳。

PFN or PFH forms binary FBS with ethyl ether, tetrachloromethane, n-heptane and toluene respectively. The critical mutual soluble temperature depends on the contents of FBS.

全氟已烯和全氟壬烯可以和乙醚、正庚烷、四氯化碳和甲苯等有机溶剂形成氟两相体系，其互溶温度与组成有关。

Quinoline catalytic cracking was studied on a fixed-bed microactivity test unit by using toluene, cetane, and tetralin as solvent.

采用固定床微反活性实验装置，以甲苯、十六烷、四氢萘为溶剂，研究了碱性含氮化合物喹啉的催化裂化转化规律。

Therefore, with integrated consideration of the situations mentioned above, if the cathode reaction could be sufficiently utilized, preparation of benzaldehyde and tolualdehyde from toluene and xylene by electrooxidation with Ce /Ce as oxidative media would be more advantageous.

因此，综合考虑上述情况，若能充分利用阴极反应，选择Ce／Ce为氧化媒质，间接电氧化甲苯或二甲苯制备苯甲醛和甲基苯甲醛将更加有利。

Comparing Ce /Ce with Mn/Mn oxidative medias, we learned that:①A better results could be achieved using Ce than using Mn as oxidant to prepare benzaldehyde and tolualdehyde from toluene or xylene with the product\'s yield 10%～15% higher;②Mechanisms of the two electrooxidation reaction were different from each other.

二者的电解氧化反应机理有所不同，Ce由Ce直接电氧化得到，而Mn则是由Mn间接电氧化获得，且前者电解氧化所需的硫酸浓度仅为后者的十分之一。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。