The study on the relation between the structure parameters of 142 carbon atoms in 39 amine(compounds) and their ~(13)C NMR chemical shifts indicates that the ~(13)C NMR chemical shifts of amine compounds are related to the ionicity index(INI),the polarizability effect index(PEI) of alkyl group and stereoscopic effect(α_(—C),β_(——C),γ_(—C)) :δ_(c)=175.
通过对39种脂肪胺化合物中142个碳原子的13C NMR谱与其部分结构参数关系的研究,发现各个碳原子的13C NMR谱化学位移与离子性指数(INI)、极化效应指数(PEI)、立体效应(α,β,γ)的关系可表示为:δc=175。
The infrared spectra show that the steric effect on the periphery of porpkyrin has no effect on ironchloride bond.
利用改进的方法合成了六种具有立体效应的氯化四（邻烷基苯基）卟啉合铁（Ｔ（ｏ－Ｒ）ＰＰＦｅＣｌ，Ｒ＝甲基，乙基，正丙基，正丁基，异丙基，叔丁基），其中五种是新合成的化合物。
The13C NMR chemical shift for an given carbon atom in aliphatic amine molecules was related to the atomic electronegativity,polarizability and steric effects of the substituents.
用原子电负性、极化度并结合表征原子空间连接方式的立体效应参数对胺分子中不同环境碳原子的化学位移进行关联,将75脂肪胺(54个脂肪一元胺,21个二元胺)中307个碳原子相关参数值和化学位移值带入模型中得到如下估算方程:δC=116。
Severe steric effects at the reactive carbon would impede the substitution.
大的立体效应阻止在碳上的取代。
Steric Effects Promoted Intermolecular C-H…O Hydrogen Bonds in Solution;
立体效应促进的分子间C—H…O氢键
Influence of Electronegativity,Polarizability and Steric Effects on the ~(13)C Nuclear Magnetic Resonance Chemical Shift of Aliphatic Amines
电负性效应、极化效应和立体效应对脂肪胺核磁共振谱化学位移的影响
Building and Control of Supplier s Supplying Performance Evaluation Index System;
供应商供应绩效评价指标体系的建立与控制
The Application of Management Accounting in the Establishment of Performance Evaluation System in Basic Banks
管理会计在基层行绩效考评体系建立中的应用
The Simulation of Propellant with Plasma Ignition Considering the Effect of Non-Fourier;
考虑非傅立叶效应的火药等离子体点火模拟
Studies on Cooling and Humidifying Effects of Different Tridimensional Greening Ways in Zhengzhou;
郑州市不同立体绿化方式的降温增湿效应研究
Establishment and Effect Research of Optimized Nitrogen Management System in Cotton Field;
棉田氮肥优化管理体系的建立及其效应研究
Establishment and Application of High Throughput Transformation Systems in Rice;
水稻高效转基因体系的建立及其应用研究
Construction of an Efficient Prokaryotic Expression System for 5-Aminolevulinate Acid and Its Applications;
5-氨基乙酰丙酸高效表达体系的建立及其应用
The Establishment and Application of the Performance Appraisal System for Public General Hospital Based on Balanced Scorecard;
基于平衡计分卡的公立医院绩效评价指标体系的建立与应用
Semiconductor devices--Discrete devices--Part 8: Field-effect transistors
GB/T4586-1994半导体器件分立器件第8部分:场效应晶体管
Establishing in vitro Rapid Propagation System of Anthurium androaeanum Lind
适于规模化应用的红掌离体高效繁殖体系的建立
The influence of topological steric effect index of substituent on the acidity of substitutedimidazolium ionic liquid
基团立体屏蔽效应对取代咪唑离子液体酸性的影响
Objective To study the indication, contraindication and clinical results of stereotactic radiotherapy( X knife) for liver cancer.
目的探讨立体定向放射治疗(X线刀)癌的适应症、忌症和近期疗效。
Consequently,it is necessary to set up a view of the general culture on the whole and pay attention to the effect of tending toward the middle and the interactive function.
因此 ,需要树立大文化整体观 ,注重事物发展的趋中效应和互动功能。
This paper studies the method of eliminating the effect of inside-the-head localization in sound reproduction by stereophonic earphone.
探讨双通路立体声耳机重发中头中定位效应的消除。
The Study on Establishment of Strain Evaluation System and Susceptivity of Mental Workers;
脑力劳动者紧张效应评价体系建立及易感性研究