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- internuclear cyclization 核间成环作用
- Cyclization occurs readily with dilute alkali. 遇到稀碱就容易环化。
- The internuclear distances in molecules can be measured in many ways. 分子中的核间距,可以用很多方法测定它。
- The hypothetical electron smeart must exert a net attractive Hellmann-Feynman force to counterbalance the internuclear repulsion. 假设的电子弥散必须提供净赫尔曼吸引力以抵消核间排斥力。
- The implementation of these rules may be illustrated by using NaF, in which the internuclear distance is 2. 31A. 以NaF为例说明这些规则的应用;在NaF中;核间距为2.;31A。
- Abstract: A 63-year-old man suddenly developed an isolated bilateral internuclear ophthalmoplegia(INO). 一位63岁的男性患者突发双侧缺血性INO。
- Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%. 以苯甲酰氯为原料;经酰化;还原;环合等反应合成左旋西替利嗪盐酸盐;反应总收率为8.;05%25。
- Study progress on cyclization of citronellal to(-)-isopulegol over catalysts is reviewed. 综述催化香茅醛环化为(-)-异胡薄荷醇的催化剂研究进展.
- Sodium ethylate was used as catalyst in Baker-Venkataraman of cyclization, and all factors were studied. 环合反应采用乙醇钠作为Baker-Venkataraman重排反应的催化剂,研究了影响反应的各个因素。
- The internuclear distances and force constants of the elementary molecules as well as of the nitrides and halides, exhibit a similar behavior. 单质分子和氮化物与卤化物，其核间距与力常数都表现有相似的行为。
- METHODS Gimeracil was synthesized by steps of condensation, cyclization, chlorination and hydrolysis. 方法以丙二腈为起始原料，经缩合、环合、氯化、水解等5步反应制得吉美拉西。
- Application of samarium diiodide in mediating intramolecular cyclization reactions was reviewed. 综述了二碘化钐在分子内环化反应中的应用。
- The mechanism was discussed in the proton acid catalytic reaction of furan phenol cyclization. 探讨了呋喃酚环合反应质子酸催化机理。
- The organometallic compounds - catalyzed cyclization reactions in syntheses of carbo -and heterocycles are reviewed. 综述了近年来金属有机化合物催化的环化反应在合成碳20环及杂环化合物中的应用。
- In contrast, switching the acylsilane functionality to an aldehyde, the radical cyclization failed. 至于将矽基酮的部分换成醛基时，自由基反应则无法进行。
- The results were as follows: (1) ABN consisted of two kinds of neurons at least: one was abducent motoneurons(AMNs) and the other was abducent internuclear neurons(AINs). 结果表明 :(1)展神经核至少含有两类神经元 ,即除展神经核运动神经元之外还含有一定数量的位于展神经核和动眼神经核之间的核间神经元 ;
- Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation. 以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇。
- The phenomonon was explained in view of the mechanism of chemical cyclization of poly(amic acid). 从聚酰胺酸化学环化反应机理出发对这一结果给予了解释。
- By adapting continuous technique of adding SO3 in the cyclization process, the volum... 该工艺已实现产业化。利用此工艺,合成了其他硫杂蒽酮类光引发剂。
- The presence of AM changes the cyclization reaction mechanism of copolymers from free radical to ionic. 结果表明，AM的引入改变了聚合物的环化机理，从自由基环化机理过渡为离子环化机理。
