查询词典 phosphines

Preliminary study indicates that phosphines are potential effective antioxidant for future high performance jet fuel.

膦化物为高性能飞机燃油潜在的抗氧剂，能显著地改善飞机燃油的高温稳定性能。

This model not only provides a new method to calculate~(31)P chemical shifts of phosphines,but also establishes the rela...

所建模型不仅在一定程度上阐明了膦类化合物31P NMR谱化学位移与其分子结构信息之间的关系，同时也提供了一种从理论上计算膦类化合物31P NMR谱化学位移的新方法，并对深入了解膦类化合物结构与性能的关系及解析、预测其31P NMR谱提供了一定的理论依据。

Traditionally, organo phosphines are used as the ligands to modify the catalytic properties of palladium complexes.

传统上，使用膦化合物为配体来调整催化活性及选择性。

Many other reactions catalyzed by phosphines have also been studied.

进而用2，3-联烯酸叔丁酯来研究[3+2]环加成反应合成螺环化合物，区域选择性有很大提高，产率也很好。

Starting from 2-bromomethyl-2-alkenoates, an active ylide as well as a 1, 3-dipole was obtained on reaction with tertiary phosphines.

本论文围绕叔膦催化下从贫电子不饱和衍生物出发的合成方法学这个主题，做了一些工作。

An intramolecular α-addition of hydroxy or amine-substituted electron-deficient alkyns catalyzed by phosphines was developed.

主要工作是利用我们小组发现的全碳1，3-偶极子在合成螺环化合物方面做了比较细致和深入的研究。

In addition to cationic gold complexes bearing bulky biphenyl phosphines, a gold complex with tris(2,6-di-tert-butylphenyl)phosphite is exceptionally reactive as a catalyst for this reaction.

在与有大体积连苯基膦配体的金正配合离子加成反应中，三(2，6－二叔丁基苯)亚磷酸盐的金配合物异常活泼并充当该反应的催化剂

Systematic investigations were made on relationship between 31P nuclear magnetic resonance of chemical shifts of 291 phosphines and their molecular structure parameters of phosphorus atoms, such as ionicity index and stereoscopic effect parameters.

摘 要 采用离子性指数、立体效应参数对291个膦化合物中磷原子进行结构表征，并与其核磁共振磷谱(31P NMR)建立定量结构波谱关系模型。

Systematic investigations were made on relationship between nuclear magnetic resonance of chemical shifts of 291 phosphines and their molecular structure parameters of phosphorus atoms, such as ionicity index and stereoscopic effect parameters ε(subscript i.

采用离子性指数、立体效应参数ε(下标 i对291个膦化合物中磷原子进行结构表征，并与其核磁共振磷谱(31P NMR)建立定量结构波谱关系模型。

In thisthesis our endeavor has been focused on the design of fluoresent sensors for sensinggroup 11 metal ions and phosphines －a very impotant type of organic molecule inthe industral and academic aspects.

三价磷的有机化合物由于其独特的配位能力已经吸引越来越多的人对它们进行深入研究，我们将三价磷受体单元同蒽荧光团有机地结合起来设计合成出下列新型含蒽荧光团双膦配体。

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 。