查询词典 cyclohexane

Cyclohexane conversion of 33.7%,selectivity to cyclohexanone and cyclohexanol of 97.2%,cyclohexan...

在70℃和n(C6H12)∶n(H2O2)=1∶2条件下，采用两次加入过氧化氢的方式，环己烷转化率为33.7%，酮醇总选择性97.2%，n∶n=1.99，过氧化氢利用率37.1%。

The catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol in air as probe reaction was performed without any organic solvent or cocatalyst, and the influences of the amount of metal porphyrin, reaction pressure, reaction temperature and reaction time on the catalytic activity were investigated.

以空气氧化环己烷制备环己酮和环己醇为探针反应，在不加入任何有机溶剂或助催化剂的条件下考察了金属卟啉用量、反应压力、温度、时间等对其催化活性的影响。

It was found that manganese porphyrin had the highest activity, and a maximum 15.4% of cyclohexane conversion and 93.9% selectivity of cyclohexanone and cyclohexanol could be obtained under the suitable conditions.

结果发现，锰卟啉催化活性最好，在适宜反应条件下，环己烷转化率高达15.4%，环己酮和环己醇的总选择性约为93.9%。

The dominant techniques of cyclohexanone synthesis from cyclohexane by catalytic oxidation were introduced.

介绍了以环己烷为原料催化氧化合成环己酮的主要方法，分析了环己烷氧化采用的主要催化剂。

By the methods of DFT,6-311Gand 6-311+Gbasis set,we optimized the geometry conformation of the neutral moleculesor ions of cyclopropane,cyclobutane,cyclopentane,cyclohexane,also calculatedthe frequency of these species.

顺磁共振实验也叫电子顺磁共振或电子共振或电子磁共振，是检测自由基的一个最灵敏、最直接的方法。

The surface activity of fluorocarbon surfactants in organic liquids such as toluene,hexane,decane,cyclohexane,nitromethane,dimethylsulfoxide,1-butanol,etc.,was investigated by measurement of surface tension.

碳氟表面活性剂由于其碳氟链既疏水又疏油的特性，除了可显著降低水溶液的表面张力之外，也可降低有机液体的表面张力﹝14﹞。

Dioxane and cyclohexane can make a small amount of disordered β-sheet and some βturn of CSL change into native β-sheet.

CSL分子的二级结构变化的程度与酶和有机溶剂作用的时间以及有机溶剂的极性强弱有密切关系。

A large number of bond-type complexes, as long as the hydrogen of the molecules covalently coupled to the molecular approach in an electronegative atom up, that constitutes a hydrogen bond, there are intramolecular hydrogen bonds and intermolecular hydrogen bonds of the points, will affect the formation of complex reaction carried out, such as in solution adding dioxa cyclohexane, or tetrahydrofuran, will reduce the alkylation reaction rate.

氢键型络合物为数众多，只要含氢的分子以共价键方式耦合到分子中一个电负性原子上去，即构成氢键，有分子内氢键和分子间氢键之分，络合物的形成将会影响反应的进行，如在溶液中加入二氧杂环己烷或四氢呋喃，都会降低烷基化反应速率。

The additional activity of the mechanical mixture can be ascribed to the acid sites on dealuminated Y zeolite, where the activated hydrogen spilt over from the neighboring Pt sites could hydrogenate the adsorbed benzene with the formation of cyclohexane and methylcycloheptane.

发现虽然Y沸石本身没有加氢活性，但它的加入可以显著提高Pt/Al2O3的活性，因为在Pt中心上得到活化的氢可以快速溢流到邻近的沸石颗粒表面的酸中心上，并和吸附在其上的苯发生加氢反应生成环己烷和甲基环戊烷。

The role of gold is to activate molecular oxygen and promote the decomposition of cyclohexyl hydroperoxide to target products, accounting for the high activity and selectivity of gold catalysts in cyclohexane oxidation.

金在环己烷氧化过程中的作用主要表现为活化分子氧，同时促进中间产物环己基过氧化氢分解为目标产物，从而表现出较高的活性和选择性。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。