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
Replacement of one of the methyl groups of (I) or (III) by an electronegative substituent such as chlorine yields the cyclohexylchlorodimethylstannanes (II) or (IV), which exist in the 1,3-diaxial conformation as a result of intramolecular hypervalent interaction between the tin and etheric ...
(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(...
Recombinant KsdD3 exhibited organic solvent tolerance. W117, F296, W299, et al., which were located in substrate-binding cavity, were predicted to form hydrophobic interaction with the substrate. Structure-based site-directed saturation mutagenesis of KsdD3 was performed with W299 mutants, which re...
positions and orientations relative to the substrate suggest that the enzyme likely imposes an unfavorable constraint on the native substrate IGA. Here, aromatization alters the pseudodiaxial conformation, elongating the C3-O distance, placing strain on the IGA substrate to break the C-O bond, and...
540G. P. Schiemenz·peri-Interactions in Naphthalenes, 14Table 2. Other compounds with potential N→X interaction (Ar-X = 2-Me2NCH2-6-R-C6H3-X,Fc-X = C5H5→Fe←(2-Me2NCH2)-C5H3X).EntryFormulaaBond N→Xd(N···X)AnglesAnglesLit.in questionC–N–CC–N–XbTyperesultc[pm]sub...
a progenitor BAHD acyltransferase, we solved the crystal structures of apo AtEPS1 and the substrate analog (2-(3-carboxyphenoxy)acetyl)-L-glutamic acid (CAG) (Supplementary Figs. 2-8) bound AtEPS1, at 1.9 Å and 1.7 Å resolution, respectively (Fig. 2a, b and Supplementary Table 1)....
The small coupling constant reflects the interaction between 4-Hax and the equatorially-oriented 5-H. 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 ...