杂环原子

The sulphur atom in the intermediate has sp2 hybridization, and the remaining p orbital is symmetrical to the d orbital of the metal center. Thus, the lone pair on the p orbital can have interaction with the d orbital to form a π bond, which leads to the coplanarity of the center of Cp ring, Ru, P, S and Si atoms, rather than the deviation of P, S and Si atoms from the plane.

该中间体中，硫原子采取sp2杂化，硫原子剩余的一个p轨道与金属中心上的d轨道具有相同的对称性，因而该p轨道上的孤电子对可与金属中心上的d轨道形成π键，导致Cp环中心， Ru， S1， P和Si原子在同一平面内，而不是S1， P和Si原子偏离该平面。

The bisquaramidoacids also showed good enantioselectivities in the reduction of diketones and up to 90％ ee were obtained.

配体中方环C3位的杂原子在反应中可能起到了Lewis碱的作用，从而使这类配体具有了双功能性。

At the same time several fused bicyclic heteroatom analogs were synthesized. Some of our Smac mimetics promote apoptosis in cancer cells.

与此同时，我们还合成了一些杂原子取代的并环Smac模拟物并测试其生物活性。

Not only the hydrogen atom of hydroxyl but also the hydrogen atom of the methyl group can transfer to the N atom of heterocycle.

不但甲醇分子羟基上的H可以作为供体质子，而且甲基上的H也可以作为供体质子而转移到芳香环的杂原子N上。

The invention comprises a cyclopalladated catalyst with axial chiral binaphthyl backbone containing phosphine ligand as well as the synthesis thereof, and the application of the catalyst with cyclopalladated catalyst with axial chiral binaphthyl backbone containing phosphine ligand with a similar structure to the hetero atom norbornadiene ring cleavage reaction through an asymmetric catalytic organic boron agent.

本发明包括一类具有轴手性联萘骨架含膦配体的环钯催化剂及其合成，以及其与具有类似结构的轴手性联萘骨架含膦配体的环钯催化剂在不对称催化有机硼试剂对杂原子降冰片二烯开环的应用。

The use of benzazepin-N-acetic acid derivatives which contain an oxo group in the a position to the nitrogen atom and are substituted in the 3 position by a 1--cyclopentyl-carbonyl-amino radical, and of their salts and biolabile esters, for the prophylaxis and/or treatment of heart damage caused by cardiotoxic doses of medicaments or chemicals, in larger mammals and in particular humans.

本发明涉及苯并氮杂∴－N－乙酸衍生物及其盐和生物不稳定的酯的应用，其中苯并氮杂∴－N－乙酸衍生物在氮原子的α位置含有氧代基，且在3－位置上被1－－环戊基－羰基－氨基残基取代，用于预防和/或治疗大的哺乳动物和特别是人体的心脏损伤，其中心脏损伤是由心脏中毒剂量的药物或化学品引起的。

It indicates that sp3 bonds have been formed between adjacent fullerene molecus via [2+2] cycloaddition reaction, leading to the inequivalent sp2 carbons on C60 cage. The former line has been broadened and has several components due to this inequivalent sp2 carbons.

这表明通过[2+2]加环反应在邻近C60分子之间形成了sp3杂化共价键，使得C60分子球笼上出现了五个位置不等价的sp2杂化碳原子，导致位于145ppm附近的sp2杂化峰展宽。

A new macrocyclic ligand was synthesized by the condensation of 1,3-propylenediamine and triamine.

用丙二胺和三-胺，在无水甲醇中进行环缩合反应，生成了一个杂原子大环配体。

The change for substitute group on chlorin ring of chlorophyll-a derivative and the effect on their visible spectra is discussed and summarized according to relation of electron effect and substituted position of different groups with conjugated region.

根据不同取代基的电子效应、取代位置与分子共轭区域的联系，提出二氮杂轮烯和四氮杂轮烯组成的非等原子芳香体系结构，总结了卟吩大环上的化学结构变化对其可见光谱的影响。

The ligand was used to prepare for a series of its transition metal complexes by the replacement reaction with metal salts.

并用该杂原子大环配体与过渡金属的盐进行置换反应，合成了相应金属：Ni、Cu、Co、Zn和Cd的大环配合物。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。