The E-TOF will also be feasible and practical to assist chemists in screening the optimal reaction condition or evaluating the overall efficiency of different catalytic systems for a specific asymmetric reaction.4.For the first time,we explored chiralγ-hydroxy-α,β-acetylenic esters,which were prepared via asymmetric alkynylation,as key intermediates to the synthesis of chiralγ-butyrolactones. This convergent and enantioselective approach to chiralγ-butyrolactones is practical and easily handled with protecting group free.

這一概念包括反應(yīng)產(chǎn)率日韩在线电影网中文字幕、對(duì)映選擇性、配體用量以及反應(yīng)時(shí)間四個(gè)重要反應(yīng)參數(shù)欧美性爱片网站，不僅適用同一反應(yīng)不同催化體系的橫向綜合性評(píng)價(jià)黄色网站视频污污污黄色，而且適用于某一特定反應(yīng)催化體系的優(yōu)化過程，有助于研究人員選擇最佳的反應(yīng)條件亚洲性爱区第一页。4欧美男女性潮免费福利看、我們發(fā)展了以手性γ-羥基-α，β-炔酸酯為關(guān)鍵中間體完成了手性γ-丁內(nèi)酯類天然產(chǎn)物的對(duì)映立體選擇性全合成人人看人人看，該關(guān)鍵中間體能夠以我們的催化體系方便的對(duì)映選擇性合成青青青手机视频在线，之后的官能團(tuán)轉(zhuǎn)換方法成熟，易于操作在线观看免费黄色网站，無需進(jìn)行繁瑣的官能團(tuán)保護(hù)和脫保護(hù)過程欧美性视品，綠色經(jīng)濟(jì)。

Homogeneous catalytic oxidations of organic substrates such as alkane and alkene catalyzed by m-oxo-bismetalloporphyrins and flexible alkoxyl oxygen linked-bismetalloporphyrins were introduced,and the catalytic mechanism of these two bismetalloporphyrins,along with the possible synergetic catalysis mechanism of binuclear central metal were discussed.

主要介紹了μ-氧代雙核金屬卟啉和以柔韌烷氧鏈相連的雙核金屬卟啉作為仿酶催化劑在均相催化烷烴黄色网站免费看a片、烯烴等有機(jī)底物氧化方面的研究進(jìn)展作爱免费视频网站，并對(duì)這兩類雙核金屬卟啉的催化機(jī)理、金屬雙核的協(xié)同催化作用機(jī)理作了論述婷婷五月丁香九月，最后展望了雙核金屬卟啉仿酶催化劑的研究前景久久亚洲精品少妇毛片无码。

The results showed that the application of photocatalytic oxidation to the treatment of wastewater was feasible and efficient, but it was affected by the operation conditions.There existed optimum value of the dosage of catalyst, initial benzamide concentration and pH value for the photocatalytic oxidation performance.H2PO-4,Cl-, Cu2+ and Al3+ showed obvious inhibition to the photocatalytic oxidation.

結(jié)果表明，循環(huán)式漿態(tài)光催化反應(yīng)器中光催化劑的用量国产综合在线观看视频、污染物的初始濃度和初始pH值對(duì)模擬污染物光催化降解性能的影響存在適宜值a黄色网址；體系中H2PO-4、Cl-高潮流水抽搐免费视频在线、Cu2+下载日韩精品视频在线观看免费、Al3+對(duì)其光催化降解過程有明顯的抑制作用。

The degradation experiments of benzamide by photocatalysis and electrically assisted photocatalysis demonstrated that the extra electric field had the obvious assistant effect on photocatalysis and the benzamide degradation rate by EAP was much higher than that by photocatalysis. When the electrode potential of photocatalyst was -0.05V/SCE, the removal efficiency of benzamide could be 95% in 120min.

苯甲酰胺降解試驗(yàn)表明亚洲观看一区二区三区，外加電場對(duì)光催化氧化技術(shù)具有較強(qiáng)的輔助作用亚洲男人天堂AV网站在线观看不卡，電助光催化氧化技術(shù)的處理效率遠(yuǎn)遠(yuǎn)高于光催化氧化技術(shù)，當(dāng)施加的電極電位為-0.05V時(shí)免费看很黄很黄A片夜色直播，苯甲酰胺在120min時(shí)的去除率可達(dá)95%免费人成网址在线播放。

The system exhibits favorable catalytic activity for the oxidation of benzylic and allylic alcohols, in spite of low activity observed for the oxidation of heterocyclic and aliphatic alcohols.

探討了TEMPO-IL/CuCl催化體系的催化機(jī)理，銅離子是反應(yīng)的活性中心。針對(duì) TEMPO/CuCl 催化體系反應(yīng)速度較慢的問題国产在线精选，研究了堿對(duì) TEMPO/CuCl 體系的促進(jìn)作用永久免费黄色毛片。

Methylpyridine-coordinated ruthenium benzylidene complex 62 shows thehighest catalytic activity. TOF=960 h~(-1) is achieved during RCM reaction of 50, TOF=4 h~(-1)is obtained during the CM reaction of acrylonitrile with 1-decene.

其中，2-甲基吡啶配位的釕卡賓配合物62的催化活性最高欧美一A片网站，在催化烯烴50閉環(huán)交互置換反應(yīng)時(shí)TOF可達(dá)960 h~(-1)999日本男人天堂啊啊啊；催化丙烯腈與1-癸烯交叉交互置換反應(yīng)時(shí)TOF達(dá)到4 h~(-1)。

Reaction trends of catalytic desulfurization of thiophene were determined based on the reaction energy needed, which was obtained with the AM1 calculation results of thiophene and possible carbonium ions on transition state.

采用半經(jīng)驗(yàn)AM1計(jì)算方法国产精品免费观看26uuu，利用靜態(tài)理論對(duì)噻吩在分子篩催化劑上的催化裂化脫硫機(jī)理進(jìn)行了量子化學(xué)計(jì)算研究人人操人人爽夜夜爽，通過對(duì)噻吩分子和可能產(chǎn)生的中間正碳離子的量子化學(xué)計(jì)算，得到各中間反應(yīng)所需的能量亚洲啪啪黄片，從而判斷噻吩催化裂化脫硫反應(yīng)的趨勢(shì)18AⅤ视频，證實(shí)了氫轉(zhuǎn)移反應(yīng)在催化裂化脫硫中所起的作用。

The experiments for determining the mechanism and kinetics of catalytic pyrolysis reaction for a simple petroleum feedstock, were carried out in a batch micro-reactor using Daqing light gas oil. The results showed that carbonium and free radical reactions were the key reactions in catalytic pyrolysis. The carbonium ions were induced by catalytic reaction, whereas free radical reaction was predominantly due to thermal cracking.

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Our purpose is simulating the catalytical action of enzyme in biologic system, so we can directly investigate the factors relating to the functions of enzyme by studying the catalyzing behavior of model molecules imitating enzyme\'s functions. And it is a base of synthesizing high performance model enzyme.

從得到的實(shí)驗(yàn)數(shù)據(jù)我們可以看出：鋅是酯水解反應(yīng)的活性中心国产黄色视频99视频；并且金屬中心相同時(shí)，配位數(shù)相同的配合物800毛片，結(jié)構(gòu)越簡單日本一本区免费中文高清，其催化酯水解效果越好；含有配位不飽和金屬中心的鋅配合物表現(xiàn)出更好的催化效果av人人摸人人操人人舔；配合物中咪唑基團(tuán)的存在可有效的增強(qiáng)這個(gè)配合物催化酯水解的效果三级做a视频免费观看。

Based on the problem of various types of catalyst and according to the features of carbonylation catalysts reactions, our team has been designed a series of new metal complexes of benimidazoles, which can be used for carbonylation catalyst of industry. Seven new benzimidazole derivatives were prepared by the o-phenylenediamine、oxalic acid老女人自卫视频、glycolic acidwww.精品2区三上悠亚.com、monomethyl monopotassium malonate、ethyl cyanoacetate欧美性爱污视频、succinic anhydride. The structures of them were confirmed by IR中文字幕一区二区三区人妻少妇、Elemental analsis. The crystal structures of d and e were determined by X-ray single crystal diffraction of Germanic Bruker Smart APEX II CCD. The catalysis of them was tested by carbonylation reactions.

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