查询词典 lewis

The incorporation of titanium into the silica framework provoked mainly a proportional increase of Lewis acid sites.

把钛加入二氧化硅的网络结构中主要产生了成比例的Lewis酸位点的增长。

Electrochemistry measurements showed that the interaction increased with raised acidity of the Lewis acid.

电化学实验还证明Lewis酸和噻吩环之间的作用随酸性的增强而增强。

From a viewpoint of synthetic organic chemistry,the recent development and application of magnesium perchlorate as a Lewis acid catalyst in organic reactions are reviewed.

从有机合成化学的角度，按反应类型综述了高氯酸镁作为Lewis酸催化剂在有机化学中的应用。

The IR sp ectra of adsorbed pyridine showed that most of the acid sites on the surface of the catalyst are Lewis acid sites.

吸附吡啶的红外光谱证明该催化剂的表面酸点多为Lewis酸点。

With the promotion of Lewis acid,these aziridines were readily hydrolyzed to generateα-chloro-phenyl-acetamide.

在Lewis酸的存在下，产物很容易进行水解反应，生成氯代的苯乙酰胺。

These catalytic reactions follow the bifunctional mechanism of Lewis acid activation and metal hydroxide activation.

催化反应遵循Lewis酸活化和金属羟基活化的双功能机理。

The Lewis acid catalyst-aluminium chloride was first used as catalyst for cyclization of pseudoionone in this study.

首次将Lewis酸催化剂氯化铝应用于假性紫罗兰酮环化反应。

This trend depended on the strength of Lewis base sites M=O and activity of lattice oxygen of catalysts.

这一顺序与各催化剂表面的Lewis碱位M=O碱性的强弱、双键晶格氧活性相一致。

Density functional theory calculations at the B3LYP/6-31G level of theory were employed to study the mechanism and the potential energy surface of Diels-Alder reactions between Lewis base stabilized borabenzene and dienophiles.

采用密度泛函理论方法在B3LYP/6-31G水平上研究了Lewis碱稳定的硼代苯与一些亲二烯体的两种可能的Diels-Alder反应的微观机理和势能剖面，并研究了反应的溶剂效应和取代基效应。

Nsted acid to activate the carbonyl group of the substrate and iV-oxide as Lewis base to activate TMSCN.

即：催化剂中的酰胺作为Brnsted酸活化羰基，氮氧偶极作为Lewis碱活化TMSCN。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。