coordinate bond

1. It is proved by the changes of binding energy that the Ln3+ ions are coordinated through O atom and S atom, Ln-O bond and Ln-S bond have a Certain covalent character and the ion character of the coordinate bond becomes stronger from La to Lu.
   结果表明：Ln3＋离子通过O原子和S原子配位形成螫合物，LnO键和LnS键均具有一定程度的共价性；从La到Lu，配位键的离子性逐渐增强；
2. The general procedure to model planar linkage in non-inertial coordinate system by bond graphs is provided.
   给出非惯性系平面连杆机构键合图模型的建立方法。
3. For structural special feature of tin, it can form complexes of four coordinate bond, five coordinate bond, six coordinate bond. As Lewis acid, these complexes can be applied as catalysts, cocatalyst in asymmetric synthesis.
   由于锡的结构特点，它可以形成四配位、五配位甚至六配位的配合物，这些配合物作为路易斯酸可用作不对称合成中的催化剂、助催化剂。
4. The IR analysis shows that the oxygen in carbonyl group of CH_ ( 3) COO in PVAc chain unit provides lone pair electron to form the coordinate bond with metal copper ion Cu ( II).
   IR分析表明：PVAc-Cu（Ⅱ）配合物中PVAc链节中的CH3COO&中的羰基氧提供孤对电子与金属离子Cu（Ⅱ）形成配位键。
5. The result shows that the hydroxyl groups of alditol and water molecules coordinate to Tb 3+ ion together while the hydroxyl groups of alditol, water molecules and chloride ions form an extensive hydrogen bond network.
   结果表明，糖的羟基和水分子同时与稀土离子配位，糖的羟基、水分子及氯离子之间形成广泛的氢键网络。
6. The dispersion of composite particles was better than TiO2 particles. TiO2 crystal type did not change in the prepared process. Infrared spectrum ( IR) showed that intensive interaction ( hydrogen bond and coordinate bond) existed between TiO2 particles and polyaniline.
   复合微粒在溶液中的分散性明显优于TiO2；制备过程中TiO2的晶型没有发生改变；红外光谱分析表明TiO2和聚苯胺之间可能存在配位键和氢键等相互作用。
7. IR analysis indicate that the coordinate bond between rare earth and TTA was formed, and the structure of Eu ( TTA) 3was not destroyed when the rare earth was doped into Eu ( TTA) 3.
   红外光谱表明，稀土与TTA形成配位键，且稀土的掺入未改变Eu（TTA）3的结构。

noun

1. a covalent bond in which both electrons are provided by one of the atoms

   Synonym:    dative bond