配基

In the complex, the tin atom is hepta-coordinated in a distorted pentagonal bipyramid including a bridging pyridyl N atom, by which the one-dimensional infinite chain is formed.

结果表明，该化合物中锡原子配位数为7，处在畸变五角双锥配位场中，化合物通过吡啶基氮原子的桥连作用形成了一维无限链状结构。

In this paper,many achievements of studying on the synthesis,thermal decomposition properties and characteristics of the energetic complexes based on high-energetic compounds containing many nitrogen atoms such as carbohydrazide and 5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one as well as tetrazole,etc.

概述了以高能多氮直链化合物如碳酰肼，富氮杂环化合物如三唑、四唑类为配体的配合物的合成、热行为以及性能的研究情况，同时简要地从分子或原子结构描述了一些其他多氮含能配体如肼、肼基甲酸甲酯等所形成的配合物的晶体结构以及热分解行为，并对含能配合物的发展方向进行了展望。

Five new Mn metal-organic coordination polymers, _n (1),{·1.5H_2O}_n (2), _n (3), _n (4) and {[Mn_3_2_2_2(H_2O)_2]·2H_2O}_n (5), were prepared through hydrothermal reactions of Mn acetate with H_2tbip or H_2mip in the presence of different dipyridyl co-ligands.

利用5-叔丁基间苯二甲酸、5-甲基间苯二甲酸和醋酸锰以及不同含氮辅助配体在水热条件下自组装得到了5个配位聚合物，_n(1)，{·1.5H_2O}_n(2)，_n(3)，_n(4)和{Mn_3_2_2_2·2H_2O}_n(5)。

Nevertheless, its fluorescence is enoughintense to be investigated the switch properties in aqueous solution. 5. The results of fluorimetric titrations and spectrophotometric titrations indicate that,for 〓 and 〓, fluorescence of fluorenyl was quenched by transfer of electron from metalcenter to photoexcited state of fluorenyl during coordination of Cu or Ni.

在酸性条件下，未配位的〓和〓都有荧光，在中性及弱碱性条件下与金属铜、镍离子配位后，发生光诱导电子转移，电子由金属离子中心转移至激发态的芴基而使其荧光猝灭。

Using Gassian98 with LANL2DZ basis sets, the quantum chemistry calculation of the model was performed.4. A series of ligands which all include imidazolyl group were designed and synthesized. The crystal structure of one of them was determined by X-ray diffraction.

设计并合成了一系列含有咪唑基的配体，应用X-射线衍射方法测定了其中一种配体的晶体结构，并用Gaussian98程序包进行了量子化学计算。

It turns out that there is no synergistic interaction between xanthan gum and hydroxypropyl starch , CMCNa. Xanthan gum and guar gum ,locust bean gum ,konjak flour have great synergistic interaction. If two or three of them mix with proper proportion, the stability of salt tolerance will greatly improve and the co...

研究结果表明：黄原胶与羟丙基淀粉、CMC－Na复配无协同增效作用，黄原胶与刺槐豆胶、魔芋精粉、瓜尔豆胶有良好的协同增效作用，两者或三者按适当比例配合后，耐盐稳定性显著提高，用量比任一单一胶少，而且使用成本大幅度降低，因此复配食品胶在高盐食品中使用具有明显的优越性和广阔的应用前景。

Octylene was synthesized via tetramerization of ethylene at the presence of a catalyst system consisted of chromium acaet as primary catalyst, methylaluminoxane as cocatalyst, bis amine as ligand under high pressure. The effects of different PNP ligands on catalyst activity and selectivity to 1-octene were investigated.

在乙酰丙酮铬、甲基铝氧烷、配体三元催化体系中，以乙烯为原料在高压下齐聚生成1-辛烯，主要考察N原子上取代基不同的PNP配体对催化剂活性及1-辛烯选择性的影响。

The new oxalamide bridging ligands N, N'-bis (4-hydroxy-3-methoxy-benzyl) oxalamide (H4LB) was designed and synthesized.

设计合成一种新型对称的草酰胺桥联配体：N，N'-二（4-羟基－3-甲氧基苯甲基）草酰胺配体(H4LB)。

Finally, the cytotoxic and antibacterial activities of the oxamido-bridged binuclear complexes were studied in vitro.. This dissertation consists of three sections as follows:1. The crystal structure of a oxamide dinitrate,(1) [H_4dmaeoxd](NO_3)_2 H_2dmaeoxd = N,N\'-bis[2-ethyloxamide, has been obtained. The diversity of complexes with different structures is carried out by successful synthetic strategy of controlling species of metal ions, counter anions, pH values and solvents in the course of synthesis. Four dinuclear complexes bridged by trans-dmaeoxd2-: [Cu_2_2](ClO_4)_2 (2), [Cu_2_2](ClO_4)_2 (3),、[Cu_2(Me_2phen)_2](ClO_4)_2 (4), [Cu_2_2(H_2O)_2] (5); Four dinuclear complexes bridged by cis-dmaeoxd2-: [NiNi_2](ClO_4)_2 (6), [CuNi_2](ClO_4)_2·2CH_3OH (7), [CuZn_2]-(ClO_4)_2·2H_2O (8), [Cu(H_2O)Ni_2](ClO_4)_2.0.5CH_3OH (9); three 1-D polynuclear complexes: [Cu_2]_n·nH_2O (10), [Cu_2(H_2O)_2-]_n·4nH_2O (11), [Cu_2(H_2O)]_n(NO_3)_n·2nH_2O (12); one 2-D polynuclear complex,[Cu_6_3(μ_3-OH)_2(H_2O)_2]_n(ClO_4)_(4n).2nH_2O (13); the others: [VO(H_2O)]·2H_2O (14), [Zn_2_4](ClO_4)_2·H_2O (15), [Cu_2]·2DCM (16) have been synthesized and characterized by X-ray single crystal diffraction, elemental analysis, IR spectra.

本论文主要包括以下三部分：一、合成得到了一个草酰胺配体硝酸盐的单晶结构，[H_4dmaeoxd](NO_3)_2 (1)；通过调控金属离子的种类、端基配体、抗衡阴离子、溶剂、pH值等条件定向合成了四个反式草酰胺桥联双核铜配合物：[Cu_2_2](ClO_4)_2 (2)、[Cu_2_2](ClO_4)_2 (3)、、[Cu_2(Me_2phen)_2](ClO_4)_2 (4)、[Cu_2_2(H_2O)_2] (5)；四个顺式草酰胺桥联同/异双核配合物：[NiNi_2](ClO_4)_2 (6)、[CuNi_2](ClO_4)_2·2CH_3OH (7)、[CuZn_2]-(ClO_4)_2·2H_2O (8)、[Cu(H_2O)Ni_2](ClO_4)_2.0.5CH_3OH (9)；三个一维聚合物： [Cu_2]_n·nH_2O (10)、[Cu_2(H_2O)_2-]_n·4nH_2O (11)、[Cu_2(H_2O)]_n(NO_3)_n·2nH_2O (12)；一个二维聚合物： [Cu_6_3(μ_3-OH)_2(H_2O)_2]_n(ClO_4)_(4n)。2nH_2O (13)；单核钒配合物[VO(H_2O)]·2H_2O (14)、草酸根桥联双核锌配合物[Zn_2_4](ClO_4)_2·H_2O (15)、美洛西康铜配合物[Cu_2]·2DCM (16)，利用元素分析、摩尔电导、红外光谱、电子光谱和单晶X-射线衍射对上述所得化合物进行了结构表征，探讨了结构影响因素，并研究了其超分子结构。

Subsequent ACE inhibitors were designed with a carboxyl zinc ligand (enalapril, lisinopril, quinapril, ramipril, cilazapril, perindopril) or a phosphinic acid zinc ligand.

后来的ACE抑制剂都设计了一个羧基锌配体（依那普利，赖诺普利，喹那普利，雷米普利，西拉普利，培哚普利）或是一个磷酸锌配体。

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。