查询词典 enol form

The keto form predominates in many aldehydes and ketones, the enol form in phenols.

在许多醛和酮中酮基都是最主要的组分。

The crystal structure analysis of photocolored product showed that the photochromic phenomenon was due to photoisomerization from enol form to keto form.

结构分析表明：其光致变色现象是由于它在溶剂与光的共同作用下发生了从醇式到酮式的异构化。

The results of density functional calculations indicate that the enol form E1 is the most stable tautomer at the ground state.

研究结果表明，醇式异构体E1为2-(2-巯苯基)苯并噁唑的优势构型；在E1向K转变过程中，存在一个较小的能垒；当考虑零点振动能后，逆向能垒消失。

In addition to the blue-shift of the lmax, the emission maximum was also blue-shifted (from 414 to 402 nm for the enol form and from 541 to 519 nm for the keto form) with remarkable emission enhancement of the keto tautomer upon aggregation.

在 blue-shift之外的lmax、发射最大值也blue-shifted(从414到33海里的enol表格好吗从这种keto 519海里的，具有显著的形式)加强keto tautomer排放在集合。

Furthermore, compared with the tautomerizing processes of uracil, the probability of 5-FU to tautomerize to its enol form is much higher. Based on such facts, the reason why 5-FU is an effective anticancer medicament but with some of toxicity is explained to some extent.

通过与尿嘧啶质子转移过程相比较，发现在各种情况下5-氟尿嘧啶异构化为烯醇式的几率均比尿嘧啶的大，在一定程度上解释了为什么5-氟尿嘧啶具有优良抗癌作用的同时具有一定的毒副作用。

The crystal structures of them show the photochromism is due to the photoisomerization only from enol form to keto form. According to the results of structure analyses, the intermolecular proton transfer mechanism is proposed for photochromism. We also observed their acidichromism in solution.

采用单晶XRD法得到了这五种化合物的结构，根据结构解析，推测四种光致变色化合物的变色机理可能是分子间质子转移，即吡唑啉酮由烯醇式结构变为酮式结构。

The reverse ESIPT can occur in the first triplet excited state (T1) to form the enol form which emits phosphorescence.

在第一三重激发态(T1)它还可以发生逆向的ESIPT而使T1态烯醇式发射磷光。

It was shownthat, among the three possible tautomers; i.e., the keto-form and the two enol forms, and thecorresponding enol anion, only the enol form 31 was actually responsible for the singletoxygen reactions.

用核磁共振及从头算法研究了化合物12b和23a在甲醇和吡啶中的烯醇化作用，结果表明，在其三种互变异构体以及相应烯醇负离子中，只有烯醇式31是实际参与单重态氧反应的成份。

A plausible process of this reaction is as following: Aldehyde was in equilibrium with the enol form, aldehyde reacted with aniline catalyzed by 2,2,2-trichloroacetic acid to afford imine, the generated imine immediately reacted with enol to form intermediate via intramolecular cyclization.

我们发现一分子芳基叠氮和一分子三苯基磷反应生成一分子磷亚胺，后者与由两分子取代的苯氧乙酰氯原位生成的烯酮反应生成4-亚烷基-β-烷基-内酰胺，其串联过程涉及烯酮亚胺的形成及其与烯酮的[2+2]的环加成反应。

At Pt electrode, DHA undergoes hydration reaction to form bicyclic product, and then further transform into 2, 3-diketogulonic acid and its enol form via the opening of lactone ring. At CuCoHCF/Pt electrode, DHA undergoes ring-opening reaction followed by degradation reactions.

但后行反应不同：在裸Pt电极上，DHA进行水化反应生成了双环结构产物，而后开环形成羧酸或烯醇结构；在CuCoHCF/Pt电极上，DHA水化反应生成开环产物，进一步又发生降解反应。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐