查询词典 Lewis base

Another is the Lewis definition (also 1923): An acid is a chemical that can accept an electron pair from a base, which they share to form a covalent bond.

另一种理论是路易斯理论(也是在1923年发表)：酸就是能由碱接受一个电子对形成一个共价键的化学物质。

The results showed that MgO has a certain strength of Lewis base, and the adsorption of BATE on MgO is monomolecular chemical adsorption.

结果表明MgO有一定的路易斯碱强度，与硼酸三甲酯之间的吸附是单分子层化学吸附。

We screened a set of Lewis base organocatalysts derived from chiral pipecolinic acid and tert-butanesulfinamide for the reduction of-N-Cbz-1- phenylpropenamine, including newly designed ones and some of those previously developed in our lab. However, only moderate stereoselectivities, albeit high yields were obtained.

在本课题组前期研究的基础上，我们筛选并设计了一系列以手性哌啶酸和叔丁基亚磺酰胺为母体的有机小分子路易斯碱催化剂，它们能催化三氯氢硅对-N-苄氧羰基-1-苯基丙烯胺的不对称还原，获得很高的收率和中等的对映选择性，并且具有很好的底物普适性。

The Lewis base property of MgO was studied quantitatively by infrared spectroscopy with boric acid trimethyl ester as the molecular probe.

采用硼酸三甲酯作为探针分子对MgO的路易斯碱性进行了红外光谱定量研究。

The RAF said two of its Tornado fighter jets from its base at Leuchars, on Scotland's east coast, were dispatched to tail the Russian Blackjacks as they approached the western Isle of Lewis.

皇家空军说，两台狂风战斗机从它们苏格兰东海岸的基地卢赫斯，被派往尾随俄罗斯海盗旗战机，当它们接近西部的刘易斯岛的时候。

Recent progress in the applications of non-enzymatic system about Lewis acid and base tokinetic resolution reactions of racemes is reviewed.

本文讨论了路易斯酸及路易斯碱催化体系在外消旋体动力学拆分反应中应用的最新进展。

The catalytic systems of Lewis acid and base are useful ways in the non-enzymatic catalysis.

在非酶催化反应中，路易斯酸碱催化是比较常用的方法，它们被广泛地用于多种外消旋体的动力学拆分反应中，目前在该领域取得了很大的进展。

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。

His predecessor , Kenneth Lewis, typically received a base salary of $1.5 million.

其前任刘易斯通常的底薪为150万美元。

Mr. Lewis' base salary for 2009 is $1.5 million.

刘易斯2009年的基本工资是150万美元。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。