离子键

In the coordination compound chemical bond mainly was refers to between the central ion and the legend chemical bond .

配位化合物中的化学键主要是指中心离子和配位体之间的化学键。

Demonstrated by adsorptive capacity and adsorptive energy, polyacrylamides have strong interaction on mineral surface with similar action mode to that of starches, for example, hydrolyzed polyacrylamide and hydroxamic acid polyacrylamide mainly by chemical force, cationic polyacrylamide by electrostatic force and hydrogen bond, nonionic polyacrylamide by hydrogen bond, while amphoteric polyacrylamide embodying both the characters of anionic and cationic one.

聚丙烯酰胺类化合物在矿物表面的吸附能以及吸附量均显示出药剂与矿物间存在的强作用，作用方式与淀粉类药剂相似：阴离子聚丙烯酰胺、羟肟酸聚丙烯酰胺主要靠化学作用，阳离子聚丙烯酰胺借助静电力和氢键，非离子型的聚丙烯酰胺则主要是氢键作用，两性聚丙烯酰胺同时具有阴离子和阳离子聚丙烯酰胺药剂的作用特点。

In one embodiment, the invention is a system for initiating free radical polymerization comprising: a in one part, one or more amido-borate compounds containing one or more anionic amido-borate moieties comprising an organoborate wherein the boron atom is bonded to a nitrogen atom of ammonia or an organic compound containing one or more nitrogen atoms, such as a hydrocarbyl amine, a hydrocarbyl polyamine, or an aromatic heterocycle containing one or more nitrogen atoms and optionally containing one or more heteroatoms or heteroatom containing functional moieties, and one or more cationic counter ions and b in a second part, a liberating compound which reacts with the nitrogen atom bound to the boron atom upon contact with the amido-borate to form an organoborane radical.

在一个实施方案中，本发明是引发自由基聚合的体系，包括：a在一个部分中，一种或多种含有一个或多个包含有机硼酸根的阴离子酰氨基-硼酸盐部分和一个或多个阳离子抗衡离子的酰氨基-硼酸盐化合物，其中的硼原子键合到氨的氮原子或含一个或多个氮原子的有机化合物，例如烃基胺、烃基聚胺或含一个或多个氮原子和任选含一个或多个杂原子或含杂原子的官能部分的芳族杂环的氮原子上，和b在第二部分中，在与酰氨基-硼酸盐接触时与键合到硼原子上的氮原子反应形成有机硼烷基团的释放化合物。

The charge distribution of H3O＋(H2O)6VIa has also been analyzed, indicating that the strength of H-bonds of the first solvation shell with the hydronium ion is stronger than that with the second solvation shell.

对H3O＋(H2O)6VIa团簇的ABEEM电荷分布进行分析，表明第一水合层水分子与水合氢离子之间的氢键相互作用要明显强于与第二水层水分子的氢键相互作用。

Molecular configurations in LB films undergo change from keto form to zwitterion assurface pressures increase,companied by intermolecular hydrogen bonds decreaseand intramolecular hydrogen bonds increase.

在LB膜中，随表面压增加，分子间氢键减少，分子内氢键增加，SBC18头基构型在转折区发生醌式→双性离子构型转变。

When surface pressures are lower than the turnover(5～30mN/m),intermolecularhydrogen bonds were formed with keto form and phase transition was higher ca.60℃;most of SBC18 formed intramolecular hydrogen bonds companied withzwitterion form and phase transition was lower ca.48℃ while at surface pressurehigher than the turnover(≥45mN/m),which is caused by the different interchaininteraction arising from various hydrogen bonds for SBC18 LB film deposited atdifferent surface pressures.

低于相应π-A等温线转折(5～30mN/m)时，以分子间氢键为主，头基主要以醌式构型存在，相变温度较高(≈60℃)；高于转折(≥40mN/m)时，以分子内氢键为主，头基主要以双性离子构型存在，相变温度较低(≈48℃)。

"Metallic bond",The positively charged ion cores are held together by mutual attraction to the electron, thus producing a strong metallic bond.

"，"带正电荷的离子核，彼此相互吸引对方电子，因此产生很强的键接称为金属键。

Ritz variation method was used to find the numerical relation between the energy near the ground-state of the hydrogen molecular ion H 2 + and the changes of the variation parameter and the bond length,the computation formula of bond length and ground-state energy for H 2 + was also obtained by means of the method of parabolic interpolation .

用Ritz变分法求出了氢分子离子H2 +基态能量附近的能量随变分参数和分子键长变化的数值关系，并用抛物线插值法获得了H2 +键长和基态能量的值及其计算公式，比文献 [1，2 ]更接近于实验值。

A positively-charged chemical species where the positive charge is localised on a carbon atom. Both carbenium ions (which have three bonds to a positively charged carbon) and carbonium ions (which may have five or more bonds to a positively charged carbon) are examples of carbocations.

碳阳离子：正电荷位于碳原子上的一种正电性的化学物种，碳正离子（三个键连接在带正电的碳上）和碳鎓离子（有五个甚至更多的键连接在正电性的碳上）都属于碳阳离子。

The results show that the formation of dry gas is abided by reaction mechanism involving the cleavage of pentacoordinated Carbonium ion which is formed by the protonation of alkanes over acidic catalyst.

结果表明，烷烃分子首先在催化剂酸性中心作用下发生质子化反应，烷烃分子链上易受到氢质子进攻的位置一般在其叔碳原子或碳链中心碳原子附近的C—H键或C—C键处，形成两种反应过渡态物种——五配位正碳离子H-Carbonium和C-Carbonium。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐