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Acetate Substitution, A benzene solution (10 mL, 20% w/v) of alkyl halide also containing 0.5 g of PEG or tergitol was added to 1.5 g of solid, dry potassium acetate and the resulting suspension heated to reflux.

醋酸换人,苯液( 10毫升, 20 %瓦/五)烷基化物还含0.5 g的聚乙二醇或tergitol添加以1.5克的固体,干燥醋酸钾和由此产生的悬浮加热回流。

Besides, n-butyl and sec-butyl tosylate that are difficult for oxidative addition can react with phenylmagnesium bromide to form corresponding cross-coupling products. Primary alkyl halide which contains β-hydrogen and is relatively hard to undergo the reaction , n-butyl chloride for instance, can react with aryl Grignard reagents in the presence of NiB alloy as well.

此外,难以进行氧化加成的对甲苯磺酸正丁酯和对甲苯磺酸仲丁酯可以与苯基溴化镁作用生成相应的交叉偶联产物;反应相对困难的含β-H的伯烷,如:正氯丁烷也可以在NiB催化下与芳基格氏试剂发生偶联。

By altering the carbon chain length,substitutional group on carbon chain,monoamine cations or biamine cations,metal cation and halide anion,we could adjust the interlayer distance,linear alkyl amines conformation and the interaction between linear alkyl amines and metal halide octahedra.

通过改变直链烷基胺的碳链长度、取代基、单双胺以及无机层的金属离子、素离子,可以调控无机层的层间距、烷基链段的排列以及烷基链与无机层的作用力等。

Polyethylene is retarded by various flame retardant systems composed of unhalogen flame retardants such as amorphous phosphorus alloy and aluminium trihydrate.

采用红磷合金、水合氧化铝、聚磷酸铵等无阻燃剂构成的多种阻燃体系对聚乙烯进行阻燃。

Many halides such as hydrocarbons and chlorinated four shuo, titanium tetrachloride, four completely miscible tin chloride, dissolved phosphorus trichloride, phosphorus oxychloride, arsenic and antimony trichloride.

上许多碳氢化合物和化物如四氯化碳、四氯化钛、四氯化锡完全互溶,还溶解三氯化磷、三氯氧磷、三氯化砷和三氯化锑。

However, Iron polyhaloporphyrin catalyzing alkane selective auto-oxidation may have a real future for its using O〓 only and high selectivity for alcohol.

代卟啉铁仅使用O〓就可催化烷烃选择性氧化,醇选择性高,可能有实用前景。

The "one-pot" synthetic reaction of 2-alkylthio-4-amino-5-cyano-6-methylthiopyrimidines from bis(methylthi-o)methylene propanedinitrile was perfected and the average yield was increased to above 70% in the present of KF/Al2O3 The problem that the amino group of above mention- ed pyrimidine compounds were hard to be acylated by trichloroacetyl chloride and benzoyl chloride was resolved by the use of NaH.

在研究合成方法的过程中,论文对KF/Al2O3催化合成本文嘧啶化合物4的&一锅煮&方法进行了完善和改进,扩大了&一锅煮&法的应用范围,可以直接使用硫酸酯、代烷、对甲苯磺酸酯进行合成,平均产率达到70%以上。

Gravy boat :An elongated, boat-shaped pitcher used to serve gravy.

中文字典上解释为船行肉盘,这里说的boat是一种有手柄的,用来盛gravy的船形盘。

Adding too much chlorine and bromine to disinfect the water can result in creation of potentially harmful trihalomethanes.

但氯加多了,也有可能产生偏高的有害物质--总三甲烷。

To technically leading products in the market stand the test,The Company and The electric light source of Fudan University,Materials Institute of China Scientific and Technical University、Source Design Studio of Northwestern University The establishment of a long-term cooperative partnership,Achieved a number of scientific and technological achievements, and made a number of patents.buibchain light electrical products are:Carbon Fiber Heater Tube、Cold Cathode Sterilizing Lamp、Halogen Heater Tube、Tungsten-lodine lamp、Ultraviolet germicidal lamp、Carbon Fiber Heaters、Energy-saving lamps、Quartz products,Crystal handicrafts, and so on.

为了产品在技术上领先、在市场上经得起考验,本公司与复旦大学电光源所、中国科技大学材料学院、美国西北大学光源设计室建立了长期的合作伙伴关系,取得了多项科技成果,并取得多项专利。宝诚照明电器的产品有:碳纤维加热管、冷阴极杀菌灯、素加热管、碘钨灯、紫外线杀菌灯、碳纤维取暖器、节能灯、石英制品,水晶工艺品等等。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。