A series of azobenzenes with different electron effect substituents were prepared from diazonium salts and benzoguanamine.

將含有不同取代基的芳胺在鹽酸介質(zhì)中進(jìn)行重氮化反應(yīng)亚欧A片视频在线观看，制得相應(yīng)的重氮鹽欧美日韩激情A片视频一站，再與苯代三聚氰胺發(fā)生偶合反應(yīng)51国产精品视频，最終得到一系列含有不同取代基的偶氮化合物欧美激情欧美激情欧美。

Upon CV and DPV experiments, the reduction and oxidation potential of these porphyrins were shown to be similar to each other. This suggests that different PAHs ethynyl substitutes would have similar effects on electrochemical properties of the porphyrin molecule.

在電化學(xué)探討部份欧美国产综合，接上不同多環(huán)芳香族取代基的紫質(zhì)分子之氧化還原電位彼此都相當(dāng)類似2av天堂网在线观看，表示這些紫質(zhì)光敏劑的能隙相當(dāng)接近，不同的多環(huán)芳香族取代基對(duì)於紫質(zhì)分子的電化學(xué)性質(zhì)影響程度相當(dāng)接近人妻精品视频一区二区三区。

Therelative rates of the Rh-mediated carbenoid insertion into the benzylic C - H bonds of aseries of para-substituted phenyl substrates: methyl 2-diazo-3-oxo-6-(4-substituted phenyl)-4-propylhexanoate 47a - g, have been measured by an indirect intramolecular competitionmethod under the condition in which the possible steric and conformational effects have beenminimized.

為了將立體因素和構(gòu)象因素最大程度減小亚洲va成无码人在线，以便較為準(zhǔn)確地評(píng)價(jià)電子效應(yīng)對(duì)該反應(yīng)的影響，設(shè)計(jì)并合成了不同對(duì)位取代基的化合物4-丙基-6-(4-取代苯基)-2-重氮基-3-氧代己酸甲酯47a-g国产va在线精品播放，并研究了它們?cè)诓煌琑h催化劑作用下的分子內(nèi)C-H插入反應(yīng)69不卡欧美。

A series of novel chiral aminophosphine ligands with binaphthyl backbone and partially reduced binaphthyl backbone were synthesized from optically pure NOBIN and H〓-NOBIN respectively. The effects of binaphthyl backbone and substitutes at the phosphorous atom on Pd (0)-catalyzed allylation of racemic 1, 3-dipheylprop-2-en-1-yl acetate with dimethyl malonate were systematically investigated.

從NOBIN出發(fā)合成了一系列膦上含有不同取代基的氮膦配體MAPs以及含有被部分還原的聯(lián)萘骨架的氮膦配體H〓-MAPs，將此兩類配體運(yùn)用于鈀催化的乙酸1日韩精品熟女中文字幕，3-二苯基烯丙基酯與丙二酸二甲酯的反應(yīng)中97久久久久精品无码一区二区97，考查了膦上取代基和配體骨架對(duì)反應(yīng)的影響。

The mechanism of outside cell reaction of electrosynthesis of p-methoxybenzaldehyde and p-bromobenzaldehye is studied by Fourier-transform infrared absorption spectra.

利用紅外光譜研究了槽外合成對(duì)甲氧基苯甲醛和對(duì)溴苯甲醛的反應(yīng)機(jī)理女人被日视频，結(jié)果證明：在Ce4+與對(duì)取代甲苯的氧化反應(yīng)中人人摸天天操，苯環(huán)上甲基被Ce4+氧化的難易受苯環(huán)上對(duì)位取代基的影響。

The charges on the substituents affected OWF〓 greatly for some azobenzene derivatives, pyridone derivatives, nitrodiphenylamine derivatives, some reactive dyes and 1, 4-diamino anthraquinone derivatives, in this instance, OWF〓 changed linearly with the change of the charges.

2給電子取代基或吸電子取代基的電荷對(duì)OWF〓有較大的影響日本免费网站视频，OWF〓隨電荷的變化而線性變化亚日韩黄色网，如某些偶氮苯衍生物、吡啶酮類染料母體把女人弄爽A片免费视频、硝基二苯胺類化合物国产精品九一精品免费视频、偶合組分和重氮組分之間夾角α變化不大的活性染料玖玖资源站在线中文字幕、1，4—二氨基蒽醌衍生物等国模高清。

This provides a convenient method for the selective oxidation of alcohols to aldehydes and ketones.

帶給電子取代基和吡啶取代基的底物能順利被氧化五月日日操。

The results show that all-aromatic polyesters with high molecular weight can be synthesized in ...

取代基的引入降低了共聚酯的熔點(diǎn)，而取代基鏈長(zhǎng)直接影響共聚酯的熔點(diǎn)美国一级AA大片免费观看。

It has also been described that the different interaction between host and the anions and the effect of electron – withdrawing group substitution on host-guest interaction from geometry features, frequency analyses, NBO analyses and frontier orbital of interaction.

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The structures were studied by IR and NMR. The absorption frequencies of the carbonyl group markedly depended on the coordination no. of the tin atom. The chem. shifts of 119Sn and 13C and the 1J(119Sn-13Sn) coupling constants of the compounds were determine Small structural changes around the tin atom were reflected in the 119Sn chem. shifts. For tributyltin arylcarboxylates, a relationship between 119Sn chem. shifts and Hammett constants of the para-substituents was found. The biol. activities of same compounds have been studied. They may be used as fungicides for fruit.

通過對(duì)它們的紅外光譜图片区小说区中文、核磁共振譜(^1^3C， ^1^1^9Sn)的研究毛片黄色黄片.COM，表明羰基紅外吸收頻率與錫原子的配位數(shù)有密切關(guān)系www.色色网站，同樣分子上的微小變化明顯地表現(xiàn)在δ119Sn上，對(duì)位取代基苯甲酸酯的δ119Sn與苯環(huán)上取代基的Hammett常數(shù)之間存在良好的線性關(guān)系：δ119Sn=19.11σ+110.612 n=791視频免费看，γ=0.9955著重研究了部分化合物在經(jīng)濟(jì)作物上的抗病原菌能力欧美性Ⅴa，結(jié)果表明，這是一類具有廣譜性的有機(jī)錫化合物AⅤ精品视频在线观看，抗菌活性優(yōu)于對(duì)比藥劑樸海因亚洲三级片久久91，接近或相當(dāng)于多菌靈，它們同時(shí)具有較強(qiáng)的除草活性99XXOO视频在线永久免费观看。