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-...
Our results demonstrate that absent pseudoallylic strain, a 1,3-diaxial interaction of an amide with a carboxylic acid leads to only a 2400-fold increase in the rate of amide bond cleavage as compared with the rate of hydrolysis of an unactivated peptide bond....
3 hybridized(Arpreferringanequatorialpositionbecauseof theminimizationof1,3-diaxialinteractions)orsp 2 (Ar preferringaxialpositionbecauseofA 1,3 straininthe equatorialisomer). [5] Nucleophilicadditiontotheepoxide wouldthentakeplaceaccordingtotheFürst–Plattner principle [6] (trans-diaxialopening),leading...
Part 1. Synthesis, chemical characterization, and nuclear magnetic resonance study of mono- and di-substituted phosphine derivatives. X-Ray crystal structure determination of the diaxial isomer of [Ir4(CO)7(µ-CO)3(Me2PCH2CH2PMe2)] 来自 RSC publishing 喜欢 0 阅读量: 24 作者:Renzo,Ros,A...
(75%:25%; ΔG° = 0.42 kcal mol−1) with a preference for the diaxial conformer was found, due to the anomeric effect which also dominates the conformational equilibrium of 3-methoxy-1,2,4,5-tetroxane; the axial conformer was found, in agreement with the X-ray structure <1998AHC(...
The remaining coupling constant of 11 Hz can only be explained by an 1,2-diaxial position of adjacent protons. Therefore, the proton in the 3-position has to adopt an axial orientation resulting in equatorial position of the substituted ethyl moiety in the 3-position. Molecules 2016, 21, ...