查询词典 tautomerism

By comparing the ready experimental results with the calculated results obtained at 7 basis sets and 3 theoretical levels, respectively, for the tautomeric form Cytl of cytosine, the relatively accurate B3 LYP/6-311+G(superscript **) theoretical method to study the tautomerism of cytosine was chosen.

分别采用7种基组、3种理论方法对胞嘧啶异构体Cytl的结构进行优化，通过与Cytl的实验结果进行比较，选取了适合研究胞嘧啶分子的B3LYP/6-311+11G方法。

Sugars (e.g., glucose) exhibit tautomerism between open forms and closed forms.

烯醇基则组成酚。

Capillary electrophoresis, enantioseparation, on-line preconcentration, keto-enol tautomerism

中文关键词：毛细管电泳，手性拆分，在线富集，烯醇互变动力学

Keywords monochalcogenocarboxylic acid;monochalcogenosilanoic acid;supramolecular/continuum model;tautomerism;proton transfer;bond dissociation energy

Article From 四川大学；物理化学硕士论文 2007年度单氧代羧酸；单氧代硅酸；超分子-连续介质模型；互变异构；质子转移；键解离能

Master the Keto-Enol tautomerism; reactions of enols:α-H substitution reactions;α-halogenation of aldehydes and ketones;α-bromination of carboxylic acids; acidity ofα-H atoms: enolate ion formation; reactivity of enolate ions; alkylation of enolate ions; mechanism of carbonyl condensation reactions;condensations of aldehydes and ketones: the Aldol reaction; dehydration of Aldol products; the Claisen condensation reaction; the Michael addition.

熟练掌握酮式－烯醇式互变异构；烯醇的反应：α-H的活性；醛酮的α卤代反应；羧酸的α-溴代反应；α-H的酸性：烯醇负离子的形成；烯醇负离子的反应；烯醇负离子的烃基化；羰基化合物的缩合反应机理；醛酮的缩合反应－Aldol缩合；Aldol缩合产物的脱水反应； Cleisen 酯缩合反应；麦克尔加成反应。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！