中间体

The mechanism of PNPP catalytic hydrolysis has been proposed based on the analytic result of specific absorption spectrum.

通过对水解反应体系的特性吸收光谱的分析，表明在PNPP催化水解的反应过程中形成了由PNPP和Co配合物组成的关键中间体。

Tebufenpyrad, a new high effective pyrazoleamide acaricide , was synthesized from 1-methyl-3-ethyl-4-chloro-5-pyrazolecarbon acid and 4-t-butylbenzylamine, the raw material are propionyl pyruvic ethyl ester and 4-t-butyl benzylchloride.

吡螨胺是一种新型、高效的吡唑酰胺类杀螨剂，本文以中间体1-甲基-3-乙基-4-氯-5-吡唑甲酸和4-叔丁基苄胺合成，起始原料丙酰丙酮酸乙酯和4-叔丁基苄氯，总收率为61.23%。

To obtain new functional aromatic polymer material, the reaction of acenaphthene with nitrobenzene under high active catalyst of AlCl3 was investigated at room temperature and ambient atmosphere.

为制备更多新型功能高分子中间体，研究了高活性lewis酸AlCl3催化作用下，苊与硝基苯在温和条件常温常压下的反应。

To obtain new functional aromatic polymer intermediates, the coupling reaction of acenaphthene catalyzed by inorganic salts, such as AlCl3, FeCl3, ZnCl2 and ionic liquid(Cl/FeCl3) was investigated at room temperature and ambient atmosphere.

为合成新型功能高分子中间体，分别研究了在AlCl3， FeCl3， ZnCl2等无机盐和Cl/FeCl3离子液体催化作用下，苊在温和条件常温常压下的偶联反应。

N-（3-Amino-4-methoxyphenyl）acetamide is an important intermediate for the production of azo disperse dyes,while it is still produced by reduction with iron powder in industry currently.

摘 要： N-（3-氨基-4-甲氧基苯基）乙酰胺是生产偶氮型分散染料的一类重要中间体。现有的工业生产方法仍全部采用铁粉还原。

Acridine and body is acetone of synthetic pyridine, acetyl, right among its amino phenol, adjacent benzene the product such as 2 phenol, will be " 95 " the market develops a stress.

医药原料及其中间体合成吡啶、乙酰丙酮、对氨基苯酚，邻苯二酚等产品，将是"九五"市场开发重点。

The optimized structures and energies of the reactants, intermediates, transition states and products of two reaction channels (corresponding to syn-acraldehyde and anti-acraldehyde) in gas or in methanol solvent were obtained. The potential energy profiles reveal the processes of the trimethylamine-catalyzed Baylis-Hillman reaction between acraldehyde and formaldehyde in gas or in methanol solvent at the microscope level.

通过研究，获得了三种情况下两种反应通道(分别对应于顺式-和反式-丙烯醛)中涉及的反应物、产物、中间体、过渡态的优化结构及其能量，并由此得到了反应的势能面图，在电子微观层次上揭示了三甲胺催化的丙烯醛和甲醛的Baylis-Hillman反应的微观过程。

The reaction process in methanol solvent can be deduced from the computational results with CPCM solvent model and the supermolecular handling, namely the reaction involves four steps in the methanol solvent. The nucleophilic addition of trimethylamine to acraldehyde generates an enolate. Nucleophilic attack of the enolate on the aldehyde forms the carbon-carbon bond, followed by the proton-transfer process and the further elimination generating the product and liberating the trimethylamine catalyst.

对于CH3OH对反应体系的影响，可以综合考虑CPCM溶剂模型及超分子模型下的研究结果，即CH3OH溶剂中反应按四步进行，催化剂三甲胺首先与丙烯醛发生亲核加成，生成的两性离子中间体与甲醛发生类似于Aldol的醛醇缩合，形成碳-碳键，之后发生分子内质子转移，最后经E1cb消除得到产物，并释放催化剂三甲胺。

The aim was to investigate the property of H3PW12O40/Al2O3 in the process of preparing pesticide intermediate acrolein.

［目的］研究H3PW12O40/Al2O3在制备农药中间体丙烯醛反应中的性能。

The method can be used to study free radical intermediate and non-free-radical intermediate, to study fast reaction and to fol...

该法既能研究自由基中间体，也能研究非自由基中间体，便于研究快反应和跟踪动态过程。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。