The results of the experiments show that substituted aryl ethers that containing nitro group (-NO2) are easy to take place nucleophilic substitution in the alkaline medium and then aryl etherbond is cleaved.

實驗結果表明91绿帽论坛，含-NO_2的取代芳基醚三级强奸黄色视频，在堿性溶液中日韩欧美另类制服变态，易發(fā)生親核取代反應日韩妓女精品影院在线观看视频网站，從而使芳醚鍵斷裂三级片电影九九热操。

Experimental results show that the different substituted location and different substituted group on benzene cycle would result in the diversity of reduction properties of substituted aryl nitrobenzene. Substituted nitrobenzenes with withdrawing group will be reduced at more positive potential, while those with repelling group will be reduced at more negative potential. In addition, the reduction potential of nitro group of o-nitrobenzene shifts more negative due to the effect of space resistance.

結果表明欧美午夜A片一区二区，芳族硝基化合物在苯環(huán)上的取代基位置不同以及在相同位置上取代基的種類不同均可使各芳族硝基化合物的電還原性能發(fā)生較大差異：吸電子取代基在電還原過程中電位較正，推電子取代基的電還原電位較負：鄰位取代基在反應過程中由于空間位阻效應日产顶级黄色片，苯環(huán)上的硝基在電還原時電位往負方向移動最新看片地址。

The present work aims to investigate and develop a series of coumarin dyes containing nitro or amino benzimidazole group for the polyester and nylon fabrics and so on.

本實驗主要目的乃針對聚酯、尼龍等織物制備出一系列含有硝基或胺基苯并咪唑基團之黃色螢光染料免费在线黄色视频网.AAA...。

He Nitro Circus crew is a group of tight-knit, highly-skilled, adrenalin-addicted friends always take the action "to 11" with the hammer down.

ravis和他的瘋子團隊全天無休地為我們上演這些"特技"网友自拍日韩视频在线观看免费，絕無冷場，只有快午夜影院妓女性爱视频，更快国产美女在线精品网站，快完蛋。精品熟女碰碰人人A久久。操国产熟女。

The results indicate that the type and number of the substituents affect the toxicity of these compounds directly. A nitro group substitution increases the toxicity of the compounds, and on the contrary, an amido group substitution decreases their toxicity. For multi-nitrobenzenes, the toxicity of the o - or p -substituted nitrobenzene is bigger than that of the m -substituted one.

苯環(huán)上取代基的類型、數(shù)目和取代位置直接影響到標題化合物的毒性大小国产高清美女一级a毛片久久，強吸電子基如硝基會降低 Q -NO2和 E LUMO大小欧美XX网，使化合物毒性增強，且鄰對位硝基取代的毒性高于間位取代国产A片观看WWWs；相反麻豆AV最新在线观看网址，給電子基團氨基的存在則會使化合物的毒性降低。

Diamino-3,5-dinitropyridine and 2,6-diamino-3,5-dinitropyridine-1-oxide was reacted with aqueous ammonia and KMnO4 under different conditions. Substitutions in the 4 position to the nitro group were obtained with high yields: 2,4,6-triamino-3,5-dinitropyridine (81.5%) and 2,4,6-triamino-3,5-dinitropyridine-1-oxide (85.4%).

以氨水為胺化劑羞羞的漫画网页，KMnO4為氧化劑国产激情全集在线观看网站，在不同反應條件下實現(xiàn)2，6-二氨基-3，5-二硝基吡啶和2日韩天天天添日日，6-二氨基-3亚洲の无码热の综合，5-二硝基吡啶-1-氧化物4位的氧化胺化反應，目標化合物2性爱欧美一区二区，4JiZZ成熟丰满熟妇，6-三氨基-3，5-二硝基吡啶和2亚洲秋霞三区色电影，4优雅人妻与黑人性爱AV，6-三氨基-3，5-二硝基吡啶-1-氧化物的收率分別達到81.5%和85.4%操死你亚州三级。

The static theoretical indexs(the Mulliken bond population, the gap of the front line orbit energy and the net charge of the nitro group) and kinetic theoretical indexs illustrate pyrolysis mechanism and are correlated with experimental impact sensitivity.

以靜態(tài)指標(鍵集居數(shù)日韩精品久久专区中文字幕、前線軌道能級差和硝基上凈電荷)和動態(tài)理論指標闡明了熱解引發(fā)機理，關聯(lián)了實驗撞擊感度精品三级在线视频。

Two classes of specific binding sites in the polymer matrix were investigated by Scatchard analysis, which indicated that two kinds of complexes between functional monomers and templates were formed before the polymerization process. Comparing with the structure of TNT and acrylamide, one kind of complex between TNT and acrylamide was strongly charge-transfer complexing interaction by p-πcomplex between electron-rich amino group of acrylamide and electron-deficiecy-benzene ring of TNT, the other was hydrogen bonding interaction between amino group (-NH_2) of acrylamide molecule nitro group (-NO_2) of TNT.

Scatchard分析結果表明欧美一极，在TNT印記聚合物微球中存在兩類結合位點，這表明在聚合反應之前亚洲三级片免费观看视频，TNT與功能單體丙烯酰胺分子之間存在兩種不同類型的作用力而自組裝成兩類的模板分子-功能單體復合物国产精品色哟，一類可能是由于富電子的丙烯酰胺和缺電子的TNT的苯環(huán)通過p-π配鍵而形成的電荷轉移復合物，另一類可能是由于丙烯酰胺的胺基與TNT的硝基之間的氫鍵作用而形成的復合物清纯唯美亚洲色图。

The structural parameters of PNHAAs, such as the the maximum N-NO2 bond length, the least N-N Mulliken population, the least negative charge on the nitro group (QNO2) and OB100, were studied to predict their relative stability or sensitivity (the easiness for initiating a detonation, high sensitivity means low stability).

通過研究PNHAAs的結構參數(shù)特级毛片A片全部兔，如N-NO2最大鍵長、N-NO2鍵的最小Mulliken集居數(shù)AV黄片全部、-NO2所帶最小負電荷国产有色又黄又爽的免费视频、氧平衡，預測了10個標題物的相對穩(wěn)定性或感度(起爆的難易程度国产精品毛片AV喷奶水。感度越高欧美日韩黄色视频，化合物的穩(wěn)定性越低)。

We described that the nitro group is a stronger electron withdrawing and meta activating characters than the imide group, the amino and hydroxy are both electron donating groups and had ortho, para activating characters. The methyl group might have a steric hindrance effect in this reaction. Our results indicated that methyl group at the ortho position of the amino group on the benzene ring, the steric hindrance effect became stronger.

另一方面十八禁看黄色，由產(chǎn)率上的結果來看色色色,免费视频，可以得知硝基為強力的拉電子基團，會減少鄰位和對位胺基的電子密度比間位多免费看欧美黄色网站；而氫氧基與胺基是供電子基團久久国产欧美日韩大片，會增加鄰位和對位胺基的電子密度比間位多；甲基取代對反應則只有立體障礙的影響国产剧情在线一区，而且與反應的氨基成鄰位存在下影響最大欧美性大片视频免费播放在线。