立体化学

通过单晶X射线衍射分析，探讨了稠杂环标题化合物的立体化学特征，并对其1,3位取代基的氢谱磁不等价现象进行了合理解释。

On the basis of X ray diffraction analysis , we discussed stereochemistry of the title compounds , and studied their 1H NMR magnetic nonequivalent phenomenon which agrees with the results of X ray analysis .

以乙醇钠为碱，由2－（1，4－亚丁二硫基）亚甲基芳甲酰丙酮与芳醛的缩合反应得到标题化合物，其立体化学经1HNMR验证为E－构型。

The title compounds were synthesized by the condensation reaction between 2 ( 1,4 butylene dithio ) methylene aroyl acetones and aromatic aldehydes with sodium ethoxide as a base . The stereochemistry of the compounds was confirmed to be E configuration by 1H NMR .

手性八配位镧系络合物的立体化学与固体CD光谱

Stereochemistry and solid-state circular dichroism spectroscopy of eight-coordinate chiral lanthanide complexes

研究和讨论了不等价的二烷基~1H、~（13）C化学位移和磷碳偶合常数与立体化学的关系。

Stereochemical dependence of 1H , 13C chemical shifts in unequal dialkyl groups and 31P 13C spin-spin coupling constants were studied and discussed .

对双重不对称合成的立体化学，以Michael反应为例进行了讨论。

The stereochemistry of double asymmetric synthesis , based on Michael reaction example , are discussed .

p区重元素亚价态离子具有立体化学活性的孤对电子，对化合物的结构和性能都产生很大的影响。

The structures and properties of the compounds are profoundly affected by the unusual stereochemical effects of the so-called lone-pair electrons in heavy p-block elements in lower oxidation states .

1,2-聚丁二烯~（13）C-NMR弛豫的立体化学依赖性

Stereochemical dependence of carbon-13 NMR relaxation in 1,2-polybutadienes in solution

维惕希（Wittig）反应的研究（Ⅰ）1,3二烯合成的立体化学

STUDIES ON THE WITTIG REACTION (ⅰ) The Stereochemistry of 1 , 3 , - diene Synthesis

化合物1a，2和3具有2或3个二电子三中心键，表明该类化合物具有与传统C化学不同的电子结构和立体化学构型。

Compounds 1a , 2 and 3 possess 2 or 3 three-center two-electron bondings , suggesting that it is necessary to adopt a delocalized molecular orbital bonding description to account for their electronic and stereochemical requirements . [ WT5HZ ]

水解反应的可能机理是SNl和SN2.双分子亲核取代反应立体化学问题释疑

The mechanisms of the hydrolysis were proposed to be unimolecular nucleophilic substitution and bimolecular nucleophilic substitution ( SN2 ) . On the Problem of Bimolecular Nucleophilic Substitution Reaction Sterochemistry

GTs家族是一个超家族，根据GTs的底物特异性和序列同源性以及糖苷键立体化学性质进行分类，GTs可划分为91个家族。

GTs was a super-family . GTs are classified into 91 sub-families according to the specificity of substrate , sequence relatedness and the stereochemistry of glycosidic linkage .

方法有机溶剂浸提，柱层析分离纯化，利用UV，IR，MS，1H-NMR，13C-NMR和二维核磁共振等实验确定纯物质的化学结构，并根据旋光值确定化合物的立体化学。

Methods Using organic solvent for crude extraction and column chromatography for further isolation . Chemical structures were identified on the basis of spectrum data of ~ ( 1 ) H-NMR , ~ ( 13 ) C-NMR , IR , UV and MS.

从全合成战略与路线、关键反应、保护基应用和立体化学方面对Holton的线性全合成紫杉醇路线进行剖析归纳。

The review described the total synthesis of taxol developed by Holton , including the synthetic strategy and routes , key reactions , application of protective groups and stereochemistry .

昆虫信息素的结构鉴定和合成ⅩⅩⅣ.（7R，8S）-（+）-和（7S，8R）-（-）-午毒蛾性信息素的合成及β-羟基硅烷的立体化学

Studies on the Identification and Syntheses of Insect Pheromones XXIV . Synthesis of ( 7R , 8S ) - ( + ) - and ( 7S , 8R ) - ( - ) - Sex Pheromone of Gypsy Moth and Stereochemistry of / 3-Hydroxysilane

在这一串联反应中我们观察到了非常有趣的立体化学。

We also had observed an interesting stereochemistry in the reaction .

次序规则在非立体化学命名中的应用

Some Applications of the ' Sequence Rules to Nomenclature of Non-stereochemistry

第一部分有详述立体化学一章。

Part I is concluded by a detailed chapter on stereochemistry .

胆色素类化合物光学活性及其立体化学研究进展

Research Progress in Bile Pigments ' Optical Activity and Stereochemistry

一种判断有机立体化学反应产物结构的简单方法

Predicting the Product Structure in Organic Stereospecific Reaction with a Simple Method

原子轨道杂化态与非过渡元素的立体化学

Atomic Hybrid Orbitals and Sterochemistry of Elements in Main Groups

立体化学史上两次大的突破

The Two Important Impacts in The History of Stereochemistry

双分子亲核取代反应立体化学问题释疑

On the Problem of Bimolecular Nucleophilic Substitution Reaction Sterochemistry

讨论了亚砜化合物的立体化学。

The stereochemistry of the sulfoxide was also discussed .

有机立体化学中若干术语和命名的讨论

Discussion on some terms and descriptors in Organic Stereochemistry

环化钩和梯分子的拓扑立体化学研究

A Study of the Topological Sterochemistry on the Cyclized Hook and Ladder Compounds

立体化学研究立体异构体以及不对称合成法。

Stereochemistry deals with stereoisomers and with asymmetric synthesis .

锑（Ⅲ）配合物的合成及其空间立体化学

Synthesis and Stereochemistry of Antimony ( ⅲ ) Complexes

互变异构的立体化学Ⅰ.烃基丙二酸酯的互变异构平衡的研究

Stereochemistry of tautomerism ⅰ . studies on tautomeric equilibrium of alkyl malonic esters

立体化学研究表明，这些反应都经过碳正离子中间体。

Stereochemistry study suggests that carbocations are generated as intermediates in these reactions .

烯甲酰化反应及其立体化学的再研究

Camphene Formylation and the Study of Stereochemistry Once Again