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- Inductive effect, conjugation effect and hyper conjugation effect are called electronic effect. 诱导效应、共轭效应和超共轭效应总称为电子效应。
- For a nucleophile, its regioselectivity is also controlled by both steric hindrance and electronic effect. 对于亲核试剂,一般的亲核试剂也同时受电子效应和空间效应的影响;
- The heterostructure intervalley transferred electron effect and its devices have been thoroughly analyzed through this work. 从而深化了对异质谷间转移电子器件及其工作机理的研究。
- Moreover, we incorporated different functional groups on ortho and meta positions of benzothiazole in order to understand the electronic effect on the metal complexation. 我们在配基设计上引入不同取代基,除了研究电子效应的影响外,更希望可成功得到单晶以进行更深入的研究。
- In textbooks of organic chemistry.the orientation rule of substituting groups in benzene ring is often explained with electronic effect (inductive effect and conjugative effect). 有机化学教材中通常是从电子效应(诱导和共轭)来解释苯环上取代基的定位规律。
- In the crossing coupling reactions, the yield is at similar level due to unobvious electron effect resulted from the existence of ketones. 苯环上取代基的种类及位置对反应也有影响。在交叉偶联中,由于有酮存在,因此电子效应不明显,产率差不多。谢谢大家!
- Electronic effect and Amromatic transitun can used to explain electrophilic substitute reaction of Heterocyclic Compounds. This thesis extra explain that thestable of link influence to the reaction. 本文试图从传统电子效应及芳香过渡态正离子稳定性角度,对五元杂环化合物代表物:呋喃、吡咯、噻吩的亲电取代反应难易程度作了解释。同时,扩展了环稳定性对反应活性的影响。
- The rule and the feature for aromatic nucleophilic substitution reaction were studied,based on the relationship between its structure and activity.The electronic effect on the reaction was discussed. 以结构与活性关系为主线,深入研究了芳香亲核取代反应的规律和特点以及反应中的电子效应的作用及其影响.
- Keep the sun behind you when you take a photo. 拍照时要让太阳留在你的身后。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- Many a time have we come across this same photo. 我们多次都见到过这同一张照片。
- We have studied analytically the electron effective mass of single-wall carbon nanotubes. 他们发现,在这两个观测结果中,特定波长的位置会随著质子对电子的质量比而改变。
- He adjusted the shutter before taking a photo. 在照相前,他调整了快门。
- The woman on the photo is my paternal grandmother. 照片上的这个妇人是我祖母。
- He took a lot of photo last sunday, and so do I. 他上星期照了许多照片,我也一样。
- The photo made him quite attractive. 照片把他拍得相当英俊。
- Electronic Effect and Solvent Effect; 诱导效应;共轭效应;超共轭效应;
- That photo is a good likeness of David. 戴维那张相片照得很像。
- The electronic effect of the 3-carbonyl group on the kinetic reactivities of the NAD(P)H models in relation to their respective thermodynamic parameters is rationalized by combination of both effects. 3-位酰基的电子效应对模型物动力学反应性的影响是这两种效应综合作用的结果.
- He hit upon a photo taken ten years ago. 他偶然发现一张十年前拍的照片。