百度试题 结果1 题目翻译“1,3-diaxial interaction”(化学专有名词).有机里面的.相关知识点: 试题来源: 解析 1,3-双轴向相互作用 反馈 收藏
The strain energy for methylenecyclohexane has been calculated to be 4.5 kcalmol−1using estimations for 1,3-diaxial strain (0.9 kcalmol−1), methyl/hydrogen allylic strain (1.3kcalmol−1), and methyl/methyl allylic strain (7.6 kcalmol−1) values.[2] The strain energy in 1,8-...
Dimethyl sulphoxide proved to be a good solvent for the diaxial cleavage of epoxides by alkali, while hydrolysis in the same solvent under acidic conditions led to the diaxial glycol 7 from the trans epoxide 3, and to the di... G Berti,B Macchia,F Macchia - 《Tetrahedron》 被引量: 63...
3-methyl-1-butene,theinteractionsbetweenthehydrogenandthetwomethylgroups intheallylicsystemcauseachangeinenthalpyequalto2kcal/mol. [7][verificationneeded] As expected,withanincreaseinsubstituentsize,theequilibriumenthalpiesbetween rotamersalsoincreases.Forexample,whenexamining4-methyl-2-pentenewhich ...
b. 1,4-diethylcyclohexaneChair Conformer of Cyclohexane:A substituent on a cyclohexane ring can either be axial or equatorial. Bulky axial substituents experience an unfavorable 1,3-diaxial interaction. Stable cyclohexane substituents ...
preferringaxialpositionbecauseofA 1,3 straininthe equatorialisomer). [5] Nucleophilicadditiontotheepoxide wouldthentakeplaceaccordingtotheFürst–Plattner principle [6] (trans-diaxialopening),leadingtotwoconstitu- tionalisomersfromthisepoxideintermediate(2,4-versus2,5- cisAr/Nurelationships).Stereochemical...
In c these 1,3 diaxial interactions will be lower.In addition, the larger your base is, the more reactive would be c respect to a towards an E2 reaction. Logged orgopete Chemist Sr. Member Posts: 2636 Mole Snacks: +213/-71 Re: Which SN1 reaction occurs faster? « Reply #6 on...
烯丙位张力 (也被称为1,3-烯丙位张力).doc,Allylic strain (also known as A1,3 strain, 1,3-allylic strain, or A-strain) in HYPERLINK /wiki/Organic_chemistry \o Organic chemistry organic chemistry is a type of HYPERLINK /wiki/Strain_energy \o Strain energy st
合成化学Chapter 2-1 Chapter2FormationofCarbon-CarbonSingleBonds §2-1烷基化反应（Alkylation）碳负离子形成条件Carbonanion 2 a.反应底物（Substrate)使其-碳上的H活化的基团，通常为吸电子基（Electronwithdrawinggroup—EWG）。-NO2>-COR>SO2R>-CN>-CO2R>-Ph,SOR 具有一个及以上的EWG 3 当溶剂的pKa...
Accordingly, all tetraaryl-3,7-diazabicyclononanes exist in the chair-boat conformation with equatorial aryl groups. Two of the five aryl substituents in 12b occupy a 1,3-diaxial position while the three neighbouring aryl groups exhibit an unexpected propeller-like arrangement. 展开 ...