四元取代的

For distinctly understanding the mutual influence between the structural units, a series of compounds from five and six-membered C-N heterocycle substituting the tetrazine ring are designed. These several types of compounds are studied by means of the quantum chemistry calcualtions and discussed the influence of the structural units upon the main performance (heat of formation, density, velocity and pressure of detonation) and found out the best combination of performance.

为了更清楚的了解结构单元之间的相互影响，设计了六元氮杂环和五元氮杂环取代1，2，4，5-四嗪得到了一系列化合物，采用量子化学计算方法对它们进行了详细的理论研究，讨论了各种氮杂环的改变对四嗪类化合物性能(包括生成热、密度以及爆速和爆压等)的影响，并找出爆轰性能较好的结构单元组合。

In this paper, the host-guest relationship between a general cucurbit [n=7] uril (Q[7]) or a new ellipsoid-host-symmetric tetramethyl-cucurbituril (TMeQ[6]) with hydrochloride salts of 4,4'-dipyridyl (44) or N,N'-dimethyl-4,4'-dipyridyl(dm44) was examined for confirming the interaction between cucurbituril (Q[6]) and these guests.

以七元瓜环(Q[7])和新型椭圆型改性瓜环―对称四甲基取代六元瓜环(TMeQ[6])为主体，4，4'-联吡啶的盐酸盐(44)以及N，N'-二甲基4，4'-联吡啶的盐酸盐(dm44)为客体的主客体相互作用进行了考察。

The transition states of ring-breaking and of N2 losing during the thermal decomposition of a series of 5-substituted–1H and –2H tetrazole derivatives have been obtained.

求得了系列5-取代-1H四唑和5-取代-2H四唑的热解开环和失N2两个基元反应的过渡态。

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。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。