配位

In addition, there are a large number of strong hydrogenbondings(N-H…O,O-H…O) and weak hydrogen bondings in involving the cations,perchlorate counter-ions,PNOS and water molecules, which result in formation 3-D networkstructure.

晶体中Ni与配体希夫碱中的N 、N(吡吡啶醛类过渡金属希夫碱配合物的合成、晶体结构及谱学表征啶)、O原子配位形成变形的八面体构型，由于分子间，存在大量的强氢键和弱氢键，这些氢键的交互作用使得该配合物形成二维网状结构。

Oxazaborolidine, which derive from the coordination of amino alcohol and borane, are good catalysts for the borane reduction reaction. A kind of fused cyclic oxazaborolidine invented by Corey and derived from proline has been successfully used in the production of MK-0417 as excellent chiral catalyst by Merck company.

在该反应中氨基醇类配体原位与硼烷配位形成的手性恶唑硼烷是该反应的良好催化剂，其中Corey等发明的由脯氨酸出发制备的稠环手性催化剂性能优异，已经在Merck公司生产碳酸酐酶抑制剂MK-0417中得到成功应用。

By utilizing three benezenemulticarboxylate derivatives (H2chdc, H2aip, NaH2sip), we obtain 12 coordination polymers. Especially, compelexes 1 and 2 are based on one-dimensional ···OHInOHIn···chains as building units, while complex 3 is based on double four-ring [In8(μ2-O)4(μ2-H2O)8]16+, complex 4 is based on trinuclear In3(μ3-O)(CO2)6, complexes 11 and 12 are both based on nested bistranded helices.

选择了三类取代苯羧酸配体： 2，5-二羟基-1，4-对苯二甲酸(2，5-H2chdc)； 5-氨基间苯二甲酸(5-H2aip)； 5-磺酸基间苯二甲酸钠盐(5-NaH2sip)和InCl3反应合成了十二个配位化合物：其中1、2以···OHInOHIn···链为构筑单元， 3以双四元环[In8(μ2-O)4(μ2-H2O)8]16+为构筑单元，4以棱柱状三核铟In3(μ3-O)(CO2)6为构筑单元，而11、12以嵌套的双股螺旋链为构筑单元。

In addition to the two axial ligations provided by His18 and Met80, the hydrogen bond and hydrophobic interactions between the heme and the protein polypeptide, the heme also covalently linked to the protein matrix through two thioether bonds which are formed between vinyl groups of the heme and cysteine residues of a classic Cys-Xaa-Xaa-Cys-His heme-binding motif of the polypeptide chain.

Cyt c是血红素蛋白中电子传递蛋白的典型代表，其辅基heme与蛋白肽链的结合除了来自heme轴向配体组氨酸(His18)和甲硫氨酸(Met80)的配位作用、氢键和疏水相互作用等非共价键作用方式外，血红辅基heme的两个乙烯基还与蛋白肽链上的结构片段域Cys-Xaa-Xaa-Cys-His中的两个半胱氨酸形成硫醚键以共价键方式相结合。

There is no longer an azido bridge between the two copper atoms, which are 5.123 (4)︿ appart. The macrocycle is in a chair-type conformation.

每个配位多面体由大环穴醚配体提供三个氮原子，叠氮离子提供一个氮原子，两个Cu离子之间不存在叠氮桥，间距为5.12︿。

In the third chapter, eight new complexes of 4, 6-dimethylpyrimidine 2-thioacetic acid with rare earth metals has been synthesized and characterized by means of elemental analysis, molar conductivity, IR,〓 NMR and TG-DTA. The general formula of the complexes is Ln〓(n=4 or 5). In the complexes, the deprotonated ligand coordinated to the rare earth metal ions in chelate bidentate mode. 4 or 5 molecular of crystal water existed in the complexes.

第三章合成了八种4，6-二甲基嘧啶-2-硫代乙酸的稀土配合物，通过元素分析、摩尔电导、红外光谱、核磁共振氢谱和热重-差热对配合物进行了表征，研究结果表明，配合物的组成为Ln〓n=4或5），在配合物中配体羧基脱去质子后采用螯合双齿的方式与稀土离子形成配位键，同时，配合物中含有4或5个结晶水。

In order to investigate therelationship between macrocyclic ligands and rare earth ions, wehave synthesized two new Schiff-base crown ether, two newdiaza-crown ether ligands and their rare earth complexes in thisdissertation. These complexes have been characterized byelemental analyses, IR spectra,〓 NMR spectra, thermalanalyses and molar conductivity measurement, we investigatedtheir ability to form coordination compounds and theircompositions and properties.

为了进一步研究和探讨冠醚配体对稀土元素的配位作用，论文首次报道了两个新希夫碱冠醚、两个新双氮杂冠醚及它们的稀土配合物的合成，并通过元素分析、热分析、核磁共振氢谱、红外光谱及摩尔电导测定，研究了配合物的组成及性质。

The experiment results indicate that higher phase splitting speed and extraction factor can be achieved when low-carbon alcohols such as n-butanol are used as organic solvents; by using five different N-carbobenzyloxy-L-amino acids as chiral ligands that are formated with Cu(superscript 2+) or Ni(superscript 2+), it is found that as a ligand, Z-Phe has a low extraction factor, while Z-Hyp, Z-Pro, Z-Glu, Z-Val have higher extraction factors, and among these, Z-Val has the highest distribution coefficient; pH value of extractant, when near to the PI of phenylalanine, helps to improve extraction resolution effect; temperature has no obvious effect on the resolution result.

结果表明：以低碳醇类正丁醇作有机稀释剂，所用5种N-苄氧羰基氨基酸（分别为Z-Phe、Z-Hyp、Z-Pro、Z-Glu、Z-Val）与Cu(上标 2+)或Ni(上标 2+)形成手性配位体后，以Z-Val作手性配体，萃取相pH值接近苯丙氨酸等电点时，萃取拆分效果最佳。

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。

It has been found that epitaxy occur in the powder by hydrothermal salt solution hydrolysis method using ZrO(NO3)2 solution as precursor,Authors consider crystal particle as a big growth unit to make epitaxy well-explained using polyhedral structure of coordinative anions model.

作者从负离子配位多面体理论模型角度，提出了把晶粒当作一个大生长基元来考虑，从而更合理地解释了取向连生和配向附生存在的规律性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。