查询词典 Salen

Quantum chemical calculations were performed based on these conformations to explain the experimental data. 4. The molecular recognition of the chiral Salen Fe complexes towards imidazole derivatives and the measure of the equilibrium constants of host-guest system of the Salen Fe and EMIm a.

用紫外-可见光谱滴定法考察了不同主体Salen-Fe对咪唑及其衍生物的分子识别行为，测定了识别过程的平衡常数和热力学参数，讨论了影响主客体配位能力的有关因素；系统地考察了主客体缔合反应的圆二色光谱性质。

One of them can efficient catalysed the alkene in the absence of dear additives by introducing an imidazole in the salen ligand.

其中分子内含咪唑的手性吡咯烷Mn催化剂成功实现了不加昂贵添加剂的情况下高效催化取代色烯环氧化反应。

Two new chiral salen-manganese complexes were synthesized and employed in the enantioselective epoxidation of indene in the presence of pyridine N-oxide and ammonium acetate as cocatalysts, respectively.

合成了两个新型的手性salen-manganese配合物，在分别以吡啶氮氧化物和醋酸铵为助催化剂的条件下，运用于催化茚的不对称环氧化反应。

Ms Salen is, in effect, seeking to mechanise Bank Street's methods by transferring much of the pedagogic effort from the teachers themselves (who will now act in an advisory role) to a set of video games that she and her colleagues have devised.

在实际行动中，萨伦女士希望将银行街的经验程序化，通过一系列她和同事开发出来的电子游戏来取代教师在教学中的作用，教师的角色将变为咨询顾问。

Some 16,000 skiers took part in the 56 mile ski race between Salen and Mora.

约16 000名滑雪爱好者参加了56英里的萨伦和莫拉滑雪比赛。

B. Three novel dimeric dissymmetric chiral ligands and six chain binuclear Salen complexes were synthesized and characterized by FT-IR,〓HNMR, Elemental analyses, UV-vis, furthermore the CD spectra properties of the ligands and complexes were discussed in detail for the first time.

合成了三个未见报道的链式双Salen配体和六个链式双核Salen金属配合物，通过核磁共振波谱、元素分析、红外光谱、紫外-可见光谱进行了表征，并首次详讨论了手性配体及配合物的圆二色光谱性质。

Four new salicylaldehyde derivatives with a glucose or mannose moiety were synthesized with 2-tert-butylphenol or 4-tert-butylphenol as the starting material, followed by the formylation, chloromethylation, nucleophilic substitution reaction with the desired carbohydrate. The salicylaldehyde derivatives condensed with ethylenediamine to give the Schiff bases, which coordinated with Mn to afford four novel sugar-based Salen Mn complexes.

首先，分别以2-叔丁基苯酚和4-叔丁基苯酚为起始原料，经过甲酰化反应、氯甲基化反应、和糖类衍生物的亲核取代反应制得了四种新型并入葡萄糖基或甘露糖基的水杨醛衍生物，将它们与乙二胺缩合生成希夫碱配体，得到的配体与过渡金属Mn~(3+)配位制备出四种新型含糖基的Salen Mn配合物。

On the base of structure and constitute analysis of organic chromium of nicotinate chromium and 〓, which all have evidently biological function, it reports the preparation of the first type of four kinds new organic chromium complexes . H〓O,. H〓O,,, in which Salen schiff base ligand and nicotinate or isonicotinate, or pyromucate, or benzoate ligand are contained simultaneously.

根据具有明显生物学功能的有机铬——烟酸铬和〓配合物的组成及结构特征，合成了第一类四种含有希夫碱Salen配体和烟酸、异烟酸、呋喃甲酸和苯甲酸的有机铬，其组成分别为。H〓O，。H〓O，，。

In this thesis, two synthetic routes for the incorporation of sugar moiety into C5(5") or C3(3") of salicylaldehyde part of Salen Mn complex were designed and several corresponding compounds were prepared, as carbohydrate derivatives are widely used in asymmetric catalytic reactions.

鉴于糖类衍生物在不对称催化反应中的广泛应用，设计了两条分别在Salen Mn配合物水杨醛部分C5(5′)、C3(3′)位并入糖基的路线并合成了相应的化合物。

Finally, two tetranuclear Cu~(2+) complexes were constructed from a new salen ligand with alkoxo groups. The two complexes were obtained by the reaction of the same ligand with Cu~(2+) in different solvents, i.e., a stage tetranuclear complex and a pseudo-cubane tetranuclear complex in MeOH and THF, respectively.

最后，本文以Schiff碱类过渡金属配合物发展应用为研究背景，设计并合成了一种新型Schiff碱及其两种构型的Cu金属配合物，发现所设计的具有和三个Schiff碱配体，与Cu_2在不同的反应溶剂中进行配位反应时，可以得到不同结构的配合物。

Objective To study the effect of chitosan in the prevention of fibrous scar formation in the epidural space after laminectomy.

目的 观察选择性脊神经后根切除术椎板切除后硬膜外几种防瘢痕粘连物质的作用并探讨其机制。

On his way to the lift, he looked back to us or was it me his eyes pointing?

当他要进电梯时，他回头看我们（或者说是我，他的眼光？