Electron donating effect (+I or +R effect) of the substituents on sulfonamide stabilizes the carbenium ion to favor oxidative coupling reaction with nucleophiles. Overall, the feasibility of C2‐H arylation of the sulfonamides has been demonstrated by steric and electronic factor that facilitates C?
1) electronic and steric effects 电子和空间效应2) photoelectron interference effect 光电子空间干涉效应3) Space-charge effect 空间电荷效应 1. The phenomenon could be explained in view of the space-charge effect. 这种现象可由空间电荷效应来解释。 2. Based on space-charge effect,I choose ...
1)steric effect空间位阻效应 英文短句/例句 1.Electronic and steric effect on the oxidation of phosphines as potential antioxidant for future jet fuel电位效应与空间位阻效应对飞机燃油抗氧剂膦化物的氧化反应的影响 2.A Study on the Location and Spatial Effect of Foreign R&D in Shanghai;上海外资R&D区...
Electronic effectFluoroalcoholFluoroalkylSteric effectAb initio calculations were performed on 18 fluorinated and unfluorinated alcohols at the B3LYP and HF levels with the 6-311G∗∗ basis set. Molar volumes of the alcohols were computed at each level and averaged to produce a scale of ...
The electronic effect of the substituents was found to be the predominant factor that controls the ease of the cyclization reaction, while the steric effect of methoxy groups in the bay regions of the TBTQ core appears to be also significant but less important. In several cases with ...
1)steric effect位阻效应 1.Taking advantage of the steric effect of nitrogen atoms in 2-methylpiperazine, selective monobenzoylate on the nitrogen atoms were investigated by five synthetic routes.根据2-甲基哌嗪中N原子位阻效应的差异,研究了其选择性单酰化反应。 2.Moreover,the steric effect and the ...
and shows the existence of three regions of distinct behaviour: R I, a "normal" behaviour region (ca 6 E's units) in which the contribution of the introduction of successive Me groups to the overall steric effect increases monotonically (groups with 1 to 7 carbons); R II, a region, in...
Basic Concepts in Organic Chemistry- Electronic and Steric Effects in Organic Molecules 来自 ResearchGate 喜欢 0 阅读量: 5 作者: VP Bulugahapitiya 摘要: This monograph expalins electronic effects and steric effects in organic molecules. Maninly three electronic effects; Mesomeric effect, Inductive ...
网络空间效应;立体张力 网络释义 1. 空间效应 空间位阻效应;ste... ... 4) 别构效应;变构效应; allosteric effect 5)空间效应;steric effects6) 空间位阻; steric hindrance ... www.chemyq.com|基于38个网页 2. 立体张力 诱导效应Inductive Effect -... ... 混成轨域效应 Hybridization Effects立体张力S...
Thus, no significant steric effect was found on the bisulfoxide (SOSO)/sulfone (SSO(2)) product ratio for aliphatic peracids with varying size of alkyl groups [R = Me, Et, i-Pr, t-Bu, (n-Bu)(Et)CHCH(2)]. However, a significant electronic effect was observed for CH(3)CO(3)H ...