Based on the mechanism of coupling reaction,the reaction of melt metallocene-based Poly(Ethylene-α-Octene) initiated by dicumyl peroxide was studied at elevated temperature in oscillatory shear flow field.

以苯胺、環(huán)氧丙烷為原料制備了N男女gif出入抽搐动态图，N 二(2 羥丙基)苯胺日韩亚洲人成在线综合日本，然后NHPPA與對(duì)硝基苯胺通過(guò)重氮偶合反應(yīng)制備了一種具有推拉電子結(jié)構(gòu)的偶氮化合物4 硝基 4′ N，N 二(2 羥丙基)氨基偶氮苯在线免费观看搞黄网站。

The application properties of azo pigements as charge-generating material, in organic photoconductors is discussed. Some types such as xanthone, bisbenzofluorenone, benzoxazole are specially reviewed. Their application properties are compared with other charge-generating materials.

論述了偶氮類電荷產(chǎn)生材料在有機(jī)光導(dǎo)體中的應(yīng)用色本土激情自拍，重點(diǎn)討論了氧雜蒽酮類、苯并啞唑類AV免费羞羞漫画在线观看真人、二苯并芴酮類等偶氮化合物作為電荷產(chǎn)生材料的光電性能大陆精品偷拍二区，并且將它們與以前使用的電荷產(chǎn)生材料相比較。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章一级大鸡吧毛片视频，研究了二碘化鐿的制備方法99国产色视频大全，以及二碘化鐿作為一種優(yōu)良的單電子轉(zhuǎn)移試劑在有機(jī)合成中的應(yīng)用：二硒醚的Se--Se鍵和二硫醚S-S鍵的還原斷裂，及其在合成烯丙基硒醚三级片毛片免费，硒代酯和烯丙基硫醚欧美韩日一区二区特黄，硫代酯中的應(yīng)用菊花奴隶人妻品评会，實(shí)驗(yàn)結(jié)果表明二碘化鐿也能促進(jìn)分子間的Barbier反應(yīng)国产欧美高清，而文獻(xiàn)認(rèn)為二碘化鐿不能促進(jìn)分子間的Barbier反應(yīng)；最后研究了二碘化釤促進(jìn)的疊氮化合物與腈的交叉還原偶聯(lián)反應(yīng)一级a毛片免灵靠看久久精品，一步高收率地制備脒的方法。

Even carbon number alkenes, phthalic esters and nitrogen heteroatom-containing components were detected in the elution fractions, while such components were not detected without silica gel column separation, indicating that preseparation is very important for increasing the sensitivity of GC/MS analysis.

各洗脫餾分用GC/MS分析狂艹美女，其可測(cè)成分與直接檢測(cè)相比久久av在，多檢測(cè)出偶碳烯烴、鄰苯二甲酸酯類和含氮化合物等华人AV网站，表明合適的預(yù)分離對(duì)提高GC/MS分析的靈敏度非常重要色久影院。

The reaction can be carried out in a non-aqueous solution and 4-aminopyridine can be diazotized with this method.

這個(gè)方法表現(xiàn)出如下優(yōu)點(diǎn)：1），整個(gè)重氮化與偶聯(lián)反應(yīng)均在非水溶劑中進(jìn)行永久福利综合国产第一页；2）日韩精品激情在线，改變?cè)喜煌读媳龋梢苑謩e得到含有一人人看人人射，二又粗又爽的视频免费，四偶聯(lián)產(chǎn)物為主的反應(yīng)產(chǎn)物；3）黄色轻点疼视频网站，可以合成在酸性水溶液中不易重氮化的4-氨基吡啶的偶氮化合物国产真人无遮挡免费网站。

In the first part of this thesis, a formal [4+2] cycloaddition of ketenes with N-benzoyldiazenes catalyzed by chiral NHCs was studied, which gave 1,3,4-oxadiazin-6-ones in very high yields and enantioselectivites.

論文的第一部分內(nèi)容是在手性氮雜環(huán)卡賓的催化下，烯酮與N-苯甲酰偶氮化合物的環(huán)加成反應(yīng)欧美一级大片肏屄，合成各種手性的噁二嗪酮制服自拍国内日韩视频，它們還可以經(jīng)過(guò)簡(jiǎn)單的兩步一鍋法制備手性氨基酯。

The structures were identified by IR, UV,〓 NMR and element analyses. 2. Free radical 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxyl as catalyst, the phase transfer catalyzed method of oxidation eighteen semicarbazides to N-Aryl-2-Phenyl diazenecarboxamide with a solution of potassium ferricyanide in 2N aqueous sodium hydroxide and dichloromethane is described for the first time.

利用2老熟妇一级毛片免费高清，2超碰在线一，6，6-四甲基-4-羥基-1-哌啶氮氧自由基為相轉(zhuǎn)移催化劑三级片视频网站进入，在飽和鐵氰化鉀的2N氫氧化鈉溶液與二氯甲烷的兩相反應(yīng)液中激情性爱视频全黄色，催化氧化十八個(gè)取代氨基脲得到十八個(gè)相應(yīng)的新型偶氮化合物N，2-二芳基二氮亞烯甲酰胺又黄又露又湿又爽的视频，均獲得了較高的產(chǎn)率欧美变态视频。