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- Keywords chiral phase transfer catalyst;chiral diquaternary amm onium salts;synthesis;asymmetric induction effect; 手性相转移催化剂;手性双季铵盐;合成;不对称诱导效应;
- The inductive effect decreases with increasing distance. 诱导效应随着距离的增加而减弱。
- Chiral micelle has asymmetric induction to some reactions. 手性胶束对反应有手性诱导作用。
- The article studies the inductive effect of erythrocytes nucleus of the toad, Bufo gargarizans by herbicide butachlor. 本文研究除草剂丁草胺对蟾蜍红细胞核的诱变效应。
- This paper expounds the negative inductive effect of alkyl and explains the order of acidity of some substances. 阐述了烷基的吸电子诱导效应,因此解释了一些物质的酸性变化顺序。
- 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。
- Objective:To study the inductive effect of absorbable crystalline glass (ACG) and absorbable crystalline glass powder(ACGP) , in osteogenesis. 目的:观察磷酸钙微晶玻璃在植入兔颌骨后的组织学变化,探索磷酸钙陶瓷的生物降解机制。
- A simple method for calculating the standard heats of formation of organic compounds containing carboxide using the inductive effect index is built up. 利用诱导效应指数建立了一个含羰基有机化合物的标准生成热的简单计算方法。
- 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。
- Amide alcohols were found to show moderate catalysis activity and no asymmetric induction in the addition of diethylzinc to benzaldehyde. 这两个手性酰胺醇表现出中等程度的催化活性但没有表现出不对称诱导作用。
- Sulfonamide alcohols were found to have moderate catalytic activity and weak asymmetric induction during the addition of diethylzinc to benzaldehyde. 这4个手性磺酰胺醇表现出中等程度的催化活性和较差的不对称诱导作用。
- Glyoxylate-ene reactions are available and important in natural product synthesis, their regioselectivity and asymmetric induction are dealt with in this paper. 乙醛酸酯的烯反应是有机合成中很重要的新反应。本文综述了该反应的区位选择性，不对称诱导及其在天然产物不对称合成中的应用。
- The inductive effect of withdrawing and releasing group and the rigidity-flexibility of the molecular chain in the structure of molecular backbone chain influence the imidization reaction. 分子主链结构中的拉、推电子基团效应及分子链的刚柔性影响醯亚胺化反应。
- The influence of the resonance effect,the conjugative effect,and the inductive effect on the absorption frequency of the characteristic chemical bonds have been discussed mainly in this paper. 重点讨论了共轭效应、共振效应、诱导效应对功能团吸收频率的影响，并利用吸收频率数据比较有机物的某些性质，如羰基化合物的亲核取代反应，若香烃的亲电取代反应，某些酸的酸性强弱，有机物的异构现象。
- Catalyst III-1 was found to show the best asymmetric induction and catalyzed the reaction of m-chlorobenzaldehyde with diethylzinc to provide sec-alcohol in 95% yield, and the ee value up to 57%. 节基胺和(习，环氧苯乙烷反应得到催化剂nl.;15，这八个催化剂催化二乙基锌和芳香醛的加成反应获得了较好的结果。催化剂1刃卜1催化二乙基锌和间氯苯甲醛的加成反应获得了95%25的产率和57%25ee。
- A series of planar chiral ferrocene modified bisphosphine pocket ligands were synthesized, which showed stronger inductive effects with the aid of planar chirality. 通过设计合成了一类平面手性二茂铁修饰的手性口袋型双膦配体，由于有平面手性的辅助而具有更强的口袋效应。
- In this paper, we propose a low power dynamic bus encoding scheme which simultaneously reduces the capacitive and inductive effects by the measurement of real RLC model. 以往的研究只针对电容效应，提出改善办法，但由于现今的晶片设计，使用了低电阻导线与高速的讯号转态时间，使得在设计汇流排时，电感的耦合效应亦必需纳入考量。
- The change of induction effect was closely correlated with the soluble carbohydrate content and respiratory intensity. 诱导效应的变化与可溶性糖含量和呼吸强度关系很大。
- The acidity of the Carboxylic acid to depends on its induction effect, conjugative effect and steric effect. 光气是无色气体，味甜，它是一个毒性十倍于氯气的肺损害剂，能引起窒息，使用时应注意安全。
- In this paper, negative induction effect of alkyl is disscussed base on the ex-periment facts. 本文根据实验事实，阐述了烷基的负诱导效应。
