配位体

In addition, Me N-Pd distance of 12c (2.080--2.083 A) is shorter than that of 15c (2.159 A).

说明二聚体中N和Pd的配位作用较强；12c中Pd和羟基O的距离为4.226？

The calcination of the catalysts at high temperature may easily result in theformation of tetrahedral structure Mo species before sulfidation,and decrease theamount of octahedral coordination Mo species.The sinter and loss of the activecomponents would take place during the calcination at overhigh temperature. Meanwhile,the active component could react with support,thus made the activecomponents entered into support bulk phase.

7催化剂在硫化前进行高温焙烧，容易形成四面体结构的钼物种，而八面体配位钼物种减少，且过高的焙烧温度易使活性组分发生烧结，同时可能发生活性组分的流失或与载体发生反应进入载体体相。

The structure and appearance of the glass-ceramics after heat-treat...

随着热处理温度的升高，β-石英固溶体转变成β-锂辉石固溶体，而且微晶玻璃相应的变为不透明的乳白色，同时红外光谱可以检测到Al—O键的配位状态，且温度越高，Al—O键所占的比重越大。

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。

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。

In addition, the relationship between the structure and the third-order nonlinear properties of this complex is discussed.

探讨了配合物的结构和其三阶非线性光学性质的关系，认为配位化合物的丌共轭离域体系的增大和金属中心离子与配体之间的电子转移是配合物具有更大非线性折射率的主要原因。

Two coordination polymers [Pb6(H2O)24]·3H2O(1)(H3cit=citric acid)and Pb(H2O)2(2)(tar=tartaric acid)were synthesized under hydrothermal conditions and characterized via IR,TG-DTA,C,H,N elemental analysis,XRD and single crystal X-ray diffraction analysis.

在水热条件下，合成了2个含柔性配体柠檬酸和酒石酸的二价铅配位聚合物[Pb6(H2O)24]。3H2O(1)(H3cit=citricacid)及Pb(H2O)2(2)(tar=tartaricacid)。用红外光谱、差热-热重、元素分析、粉末X射线衍射及单晶X射线衍射等手段对化合物进行了表征。化合物1属三斜晶系，P1空间群，a=0.97053(19)nm，b=0.9764(2)nm，c=1.0955(2)nm，α=109.016(3)°，β=98.380(3)°，γ=92.136(3)°，V=0.9671(3)nm3，Z=2，R1=0.0420，wR2=0.1049，GOF=1.064。

The regularities of the substitution effects of the electron-pushing group and the electron- withdrawing group on the electronic structures and the related properties of the complexes, e.g. the energies and the compositions of some frontier molecular orbitals, the spectroscopy properties, the atomic net charge populations on main ligands, the coordination-bond lengths and the coordination-bond angles of the complexes, etc. have been investigated.

探讨供电子基团和拉电子基团在主配体上的取代对配合物的电子结构及相关性质，如配合物前沿分子轨道的能量、组成、光谱性质、原子的净电荷布居及配位键长键角等的影响规律。

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。