cis，trans按基团的相同或相似性来定，相同或相似基团在同侧为顺（cis）,异侧为反（trans）。一般象...
If we go back to our cis/trans practice problems, such as cis and trans 2-butene, you’ll see that we can use the E/Z system here as well. Carbon 2 and 3 each have a methyl group outranking a hydrogen atom. When they are cis, you get Z. When they are trans you get E. A ...
1.cis/trans和Z/E属于两套体系,不等平行考虑,不存在包含与被包含的关系。2.cis/trans只适用于1,2-双取代乙烯。这一点本人保留意见,我觉得有时候AB/AC型的烯烃也可以这么表示。3.Z/E在理论上是普适的,也是IUPAC规范的表示方法。对于它,问题似乎是清晰的。 14楼2012-02-18 13:32 回复 沥青120 量子...
e/z‐selectivity (incl. e/z‐isomerismcarboxylic acid derivatives (naphthalene compoundsNaphthyldiene derivatives, 1 - 4 , carrying electron-donating groups at one end and electron-withdrawing groups at the other, were synthesized to study the photoisomerization process. All the compounds showed ...
【题目】写出下列物质的结构式:(1)(E)-2甲基 -3-己烯(trans)2)(S)-3氯 -1-戊烯(3)(R),(Z)-2-氯 -3-庚烯(cis)
Short stereocontrolled synthesis of trans and cis-tetrahydro-pyrazinoisoquinolinedionesacetalsN-acyliminium cationsaromatic substitutionannulationsepimerizationGraphicdoi:10.1016/S0040-4039(03)00897-9Juan Francisco GonzálezElena de la CuestaCarmen Avendao...
Conformational Preferences and cis−trans Isomerization of Azaproline Residuedoi:10.1021/jp067826tThe conformational study of N-acetyl-N'-methylamide of azaproline (Ac-azPro-NHMe, the azPro dipeptide) is carried out using ab initio HF and density functional methods with the self-consistent ...
ChemInform Abstract: cis and trans Derivatives of Sulfur Hexafluoride Resulting from Oxidative‐Addition‐Displacement Reactions of (Trifluoromethyl)imidosulfites with Chlorine Fluorideother reactionsThe (trifluoromethyl)imidosulfites (III) and (V) are prepared by reaction of the corresponding alcohols (I) ...
Moreover, the characteristics of selective reflection which was associated with the birefringence of the N*-LC dropped with azobenzene LCs and the effect of trans-cis photoisomerization of these compounds on selective reflection were studied in detail. 展开 关键词: Azobenzene birefringence isomerization ...
3b). Many AJUBA single mutations have much larger effects (Z-score < −3) than single mutations in NEIL1 and TTYH2. This difference may be explained by the long distance (524 nt) between AJUBA editing strand and ECS, such that mutations may lower the probability of forming this...