1) Slmple Discussion on Hyperconjugation Effect
浅谈超共轭效应
3) Hyperconjugation
[,haipəkəndʒu'ɡeiʃən]
超共轭效应
1.
In this paper,the stability of propene is briefly described with hyperconjugation;the activity of α H in propene is explained with inductive effect and conjugative effect:the different elctronegativity between C sp2 and C sp3 ,and the stability of active intermediate——allyl free redical.
通过诱导效应和共轭效应及超共轭效应对丙烯及烯丙基自由基稳定性的分析 ,从理论上解释了丙烯的稳定性及其α-H的活泼性 。
4) conjugative effect
共轭效应
1.
According to the()~(13)CNMR chemical shifts of substituted benzene,conjugative effect parameter and inductive effect parameter are established.
以取代苯苯环碳原子化学位移为依据,用曾经设定并初步证实的甲基诱导效应和共轭效应参数,讨论了甲基取代基的诱导效应、共轭效应及定位效应。
2.
In this paper,the stability of propene is briefly described with hyperconjugation;the activity of α H in propene is explained with inductive effect and conjugative effect:the different elctronegativity between C sp2 and C sp3 ,and the stability of active intermediate——allyl free redical.
通过诱导效应和共轭效应及超共轭效应对丙烯及烯丙基自由基稳定性的分析 ,从理论上解释了丙烯的稳定性及其α-H的活泼性 。
3.
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。
5) conjugation effect
共轭效应
1.
Quantum methods,B3LYP,QCISD and CASSCF(8,8) have been carried out on phenylcarbene(Ph—CH) to investigate the effect of stereoscopic effect,hybrid of the central carbon and conjugation effect on the singlet-triplet splitting of phenylcarbene.
使用量子化学方法B3LYP、QCISD和CASSCF,以6-311++G**和6-311G**为基组,对单、三重态苯基卡宾进行了计算研究,讨论了立体效应、中心碳的杂化和共轭效应对单-三重态稳定性的影响。
2.
2293 PX Where XP(G) is the equalized electronegativity of free radical, PEI is the polarizability effect index of R groups or atoms in free radicals R3C·, VNRP is Valence electron - Nonbonding electron Repulsion Potential, C + R is conjugation effect of R groups or atoms in free radicals R3C·, PX is metamorphosis pot.
其中 ,XP(G)为自由基的均衡电负性 ,PEI是自由基中R基团或原子的极化效应指数 ,VNRP是价电子──非键电子排斥势 ,是自由基中R基团或原子的共轭效应 ,PX是基团变形势。
3.
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。
6) conjugate effect
共轭效应
1.
Influence of conjugate effect on the properties of organic compounds;
共轭效应对有机化合物性质的影响
补充资料：超共轭效应
分子式：
CAS号：
性质：C-H键和C-C双键直接相连时,σ键与π键发生的共轭，又名σ,π-共轭(σ,π-conjugation)。由此产生的电子效应，称为超共轭效应。它表现在组成C—H键的σ电子向碳碳双键转移(即离域，用弯箭头表示)。参加超共轭的C—Hσ键越多，超共轭效应越强。
CAS号：
性质：C-H键和C-C双键直接相连时,σ键与π键发生的共轭，又名σ,π-共轭(σ,π-conjugation)。由此产生的电子效应，称为超共轭效应。它表现在组成C—H键的σ电子向碳碳双键转移(即离域，用弯箭头表示)。参加超共轭的C—Hσ键越多，超共轭效应越强。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条