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电子效应     
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  electronic effect
     Structural and Electronic Effect of TiO_2 in CuO-ZnO/Al_2O_3-TiO_2 Catalyst
     CuO-ZnO/Al_2O_3-TiO_2催化剂中TiO_2的结构和电子效应
短句来源
     σ_(△E)~(HO) as a Quantitative Criterion of the Measurement of the Electronic Effect of Substituents
     以σ_(△E)~(HO)度量取代基电子效应强度的定量判据
短句来源
     Also, the addition of K influences the adsorption of H2 and CO on catalyst surface through its electronic effect.
     同时K还通过电子效应影响了H_2和CO在催化剂表面的吸附行为。
短句来源
     The supported Ni interacts strongly with TiO_2 via electronic effect.
     负载后的Ni与TiO_2之间有较强的电子效应
短句来源
     The results showed that acid treatment results in the dissolution of magnesium from sepiolite framework and the formation of a high specific surface area material. The catalytic performance determination showed that comparing with Pt/Al2O3, Pt/sep-Al2O3 has higher activity for cyclohexane dehydrogenation and anti-poisoning ability, In addition, the results revealed that electronic effect is more significant than steric effect in cyclohexane dehydrogenation reaction over Pt/sep-Al2O3 catalyst.
     结果表明,酸处理能使Sepiolite骨架中的呐“发生解离,生成一种高比表面积的产物。环己烷在经酸处理的sepiolite担载Pt催化剂上的脱氢活性远较Pd/Al2O3高。研究结果还表明,在Pt/sep-Al2O3催化剂上,电子效应较几何效应对环己烷脱氢作用更显著。
短句来源
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  electron effect
     The Influence of Molecular Configuration and Substltuent Electron Effect on ~(13)C NMR Spectra of Diethyl 2,3-Dicyano-2,3-di(p-X substituted phenyl)succinate
     2,3-二氰基-2,3-二(p-X苯基)丁二酸二乙酯的分子构型和取代基电子效应对~(13)C NMR谱的影响
短句来源
     Single Electron Effect and Its Application
     单电子效应及其应用
短句来源
     The author approaches reactivity of double bond α-H from electron effect and frontier orbital theory.
     笔者从电子效应和前线轨道理讨论了双键α-H的反应性。
短句来源
     Ten 1 - phenylazonaphthalene dyes were synthesized, and their 1H,13C NMR spectra were recorded with emphasis on the criteria of azo and hydrazone tautomers on 1H,13 C NMR spectra. The electron effect and stereohindrance of substituents on the naphthalene ring, as well as the solvent effect on azo - hydrazone tautomerism were discussed.
     本文合成了10个1-苯基偶氮萘染料,并测定了其~1H、~(13)C NMR(核磁共振)谱,对~1H谱进行了归属,确定了2种异构体的判据,讨论了萘环上取代基的电子效应和空间障碍、溶剂的极性和pH值对偶氮-醌腙互变异构的影响。
短句来源
     THE INFLUENCE OF SUBSTITUENT ELECTRON EFFECT ON NMR CHEMICAL SHIFT OF SUBSTITUTED BENZANILIDE
     取代基的电子效应对苯甲酰苯胺衍生物NMR化学位移的影响
短句来源
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  electronic effects
     Study of Electronic Effects Caused by Interaction of Promoter and Support in Ni-LaO_x/r-Al_2O_3 Catalyst
     Ni-LaO_x/r-Al_2O_3催化剂中助剂及载体电子效应的研究
短句来源
     Ni/Al_2O_3system and the active adsorption of CO on its surface had been studied using SCC—DV—Xa method. It was discovered that intensive electronic effects existed between nickel and A1_2O_3 after the former had been supported by the latter.
     本文采用自旋极化的SCC—DV—X_α方法研究了Ni/Al_2O_3体系和CO在该体系上的吸附(CO/Ni/Al_2O_3),研究表明,Ni负载于Al_2O_3后,Al_2O_3与Ni之间存在着较强的电子效应;
短句来源
     Electronic Effects in Pd Alloy Catalysts for Oxygen Reduction
     氧还原Pd合金催化剂中的电子效应
     The Electronic Effects of Alkyl
     烷基的电子效应
短句来源
     The Visible Spectra and Electronic Effects in Axial Coordination Reaction of Zinc Porphyrin Complexes
     锌卟啉配合物轴配反应的光谱及电子效应
短句来源
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  electron-effect
     On the Electron-Effect in Organic Chemistry
     有机化学中的电子效应
短句来源
     By analysing the electron-effect and enumerating its application to organic chemistry, this paper studies the importance of electron-effect in the structural theory of organic chemistry.
     通过对电子效应的分析和列举其在有机化学中的应用 ,说明了电子效应在有机化学结构理论中的重要性
短句来源
     This article makes a discussion on the electron-effect and the reaction mechanism,and takes the actual examples to explain them.
     本文从电子效应和反应历程两个方面作了讨论,并通过具体实例加以解释.
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  electronic effect
The electronic effect, steric effect and the polarity of solvent were considered to be the main aspects.
      
The annihilation lifetime and intensity were found to depend not only on the electronic effect of the γ-substituent in the chelate ring but also on the structure of the complex.
      
An activity enhancement of the Ag atoms on the Ag-Pt/C alloys compared to pure Ag is ascribed to an electronic effect induced by the presence of Pt, increasing the Ag-O adsorption strength.
      
These phases are characterized by different enthalpies of formation of intermolecular bonds and different mechanism of electronic effect transmission via these bonds.
      
The partial reaction rate constant for chair, twist forms, thereaction susceptibility parameters to the substituent electronic effect at the C2atom are obtained.
      
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  electron effect
For R = H, CH3, and C6H5, the description is based on the principle of additivity; i.e., the electron effect of R proportionally increases with n.
      
Thc molecular recognition mechanism is discussed from the viewpoint of the structural factors, electron effect of the substitutent groups and thc size and chain length of the fluorophore.
      
It is shown, from a pair-population analysis of the two-particle density matrix (which is analogous to a Mulliken population analysis of the one-density) that the orbital localization is a two-electron effect.
      
The improvement was due mainly to the proton - electron effect of gadolinium rather than the dipole relaxation of MT.
      
Considering the hot-electron effect due to the high electric field, the mechanism underlying the current oscillation is discussed.
      
更多          
  electronic effects
The reactivity of the cobalt porphyrins is governed by both structural and electronic effects.
      
Steric and Electronic Effects of Substituents on the Yield of 5,15-Substituted Octaalkylporphines
      
It is shown that the difference in the reactivity of the oxiranes is caused by the electronic effects of substituents and the protonation by the phenolic oxygen atom of phenyl glycidyl ether.
      
Electronic Effects in X(CH2)nY Homologous Series by NMR and Quantum Chemistry
      
Phototransformations can go through nitro-nitrite rearrangement with the participation of two alternative T(nπ*) levels, depending on the size and electronic effects of the substituent.
      
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