查询词典 sulfur ether

In the presence of NaH and in DMF, the acyclic crown ethers 1a and 1b were synthesized by the reaction of di-or triethyleneglycol ditosylate and o-methoxymethoxybenzyl alcohol, which was obtained from salicylaldehyde via the protection of the hydroxyl group with chloromethyl methyl ether followed by the reduction of the formyl group with NaBH4. The hydrolysis of 1a and 1b with dilute hydrochloric acid provided the diphenolic type acyclic crown ethers 2a and 2b respectively in good yield.

将水杨醛与碱和氯甲基甲基醚反应，再经过NaBH4还原，即制得邻苯甲醇，然后将其在DMF中与NaH和二甘醇二对甲苯磺酸酯反应，得开链冠醚1a和1b.1a和1b经稀酸水解，即脱保护而分别生成新的酚型开链冠醚2a和2b。

Since TAME boils at 86 C and the hexyl ethers have an even higher boiling point, the ether products can the separated from the light FCC gasoline reffinate in the reactor fractionator used in the TAME process.

因为温驯的煮沸在86 C 和己基的以太有更高的沸点，以太产品装于罐中被分离从光FCC 汽油reffinate 在反应器fractionator 被使用在温驯的过程。

Proceeding from the considerations of environmental protection,we choose petroleum ether other than Freon.

从保护环境的角度出发，应放弃氟利昂，选择石油醚。

If the Galilean relativity principle is valid, then motion through ether makes no sense at all.

如果伽利略相对性原理是有效的，则运动通过以太决不会有任何意义。

It is shown that the methanol dimer and methanol cluster are the predominant species of methanol in gaseousness. So we believe that rather the methanol dimer is the original reactant of the methanol dehydration reaction to dimethyl ether than the mono-methanol.

研究表明，在气相中，甲醇分子主要以二聚体和多聚体的形式存在，据此提出甲醇脱水反应的原始反应物是甲醇二聚体，而不是单个甲醇分子。

This paper discusses the solution and using performance of three type of glyceryl glycidic ether in polyester dipping .

讨论比较三种缩水甘油醚产品(Raschig公司的GE10 0 ；EMS公司的G170 1以及长濑公司的EX 313)在涤纶浸胶帘帆布浸胶配方中的溶解和使用性

We describe herein that newly developed ether-containing ionic liquids dissolve carbohydrates,and this unique "sugar-pgilic" property allows formation of glycolipid bilayer membranes in ionic liquids.

我们描述此处新开发醚载离子液体溶解碳水化合物，这独一无二的"糖pgilic "属性允许形成糖脂双分子膜的离子液体。

To our present knowledge, only the solutions of derivatives of Grignard reagent RMgX in ether could be employed as the electrolyte.

镁负极由复杂的吸收过程控制，被吸收的组分主要取决于所用电解质。

The best yields are obtained if the ether solvent is distilled from the Grignard under vacuum and replaced with hydrocarbon solvent, such as benzene.

最好的产量得到醚溶剂，如果是从格氏蒸馏真空和烃类溶剂，如苯，取代。

0 G of cyclopentyl bromide and 19.4 g of magnesium are reacted in ether or THF to give a cyclopentyl Grignard reagent.

一百十九点零克的环戊基溴或溴环戊烷和十九点四克的镁在乙醚或四氢呋喃中产生反应，形成一个环戊格氏试剂。

In other research, chondroitin is being investigated for use in several other conditions.

在其它研究，软骨素被调查用於几个其它情况。

They would make fun of him for having to work.

他们拿他的工作来开玩笑。