The dinitrobenzene with electron-withdrawing group can be hydrogenated much easier than the dinitrobenzene with electron-donating group.
含有吸电子基团的二硝基苯类化合物反应活性明显高于含有供电子基的二硝基化合物的加氢反应；
The oxidation potentials of these compounds are higher than those of TMT-TTF analogue probably due to the existence of electron-withdrawing ester linkages in the distance.
它们的氧化电位均高于对照化合物TMT-TTF，这可归因于位于分子远处的吸电子的烷氧羰基的存在。
Due to the strong electron-withdrawing property of CF3 - group the substitution of ortho-chloro shows a higher probability, implying the in-principle feasibility of the reaction.
由于此物质中CF 3具有强吸电子能力，所以其邻位的氯更易被取代，这就说明此反应理论上是能够发生的。
With increasing the electron withdrawing substituents in the phenoxy ring, the catalytic activity was increased, and the molecular weight of polyethylene decreased.
研究表明水杨醛亚胺镍配合物中苯环上取代基的电子效应和空间位阻对乙烯聚合活性和聚合物的分子量有所影响。
Electron withdrawing groups can enhance the limiting effect for this kind of complexes, but the effect of heavy atom ACTS opposite role.
吸电子基团能增强该类配合物对皮秒激光的限幅效果，而重原子效应则起相反的作用。
Moreover, We found that the relaxation time of H2TPP with donating electron group is about 7 times faster than that with withdrawing electron group.
另外，还发现推电子基团取代的卟啉弛豫过程比吸电子基团取代的卟啉弛豫过程快7倍。
To strike an the arc, electron emission and ionization of the gas is initiated by withdrawing the electrode from the work surface in a con trolled manner, or with the aid of an initiating arc.
钨极氩弧焊是通过工件表面和电极之间气体的电离和电子的发射来引弧的。
The electron withdrawing group (F) being introduced into the alkyl groups of then-hexyl ZDDP is able to strengthen chemical adsorption between ZDDP and Fe atoms.
在伯烷基上吸电子基团能增强硫原子与铁原子之间的化学吸附作用力。
Electron - withdrawing 2 - substituents and electron - donating 3 - substituents of the phenyl ring are favorable for increased herbicidal activity.
苯环2位是拉电子基，3位是给电子基有利于提高除草活性。
Raman spectroscopy results showed that: the presence of electron withdrawing groups improved the bond energy of C-H in the benzene ring.
拉曼光谱分析结果证明：吸电子基团的存在使苯环上c -H的键能提高。
In the present paper, a series of xanthene-2-carboxylic acids and xanthone-2-carboxylic acids with electron withdrawing groups on the 7-position had been synthesized.
本文合成了一系列7位拉电子基团取代的氧杂蒽-2-羧酸及氧杂蒽酮-2-羧酸化合物。
In the present paper, a series of xanthene-2-carboxylic acids and xanthone-2-carboxylic acids with electron withdrawing groups on the 7-position had been synthesized.
本文合成了一系列7位拉电子基团取代的氧杂蒽-2-羧酸及氧杂蒽酮-2-羧酸化合物。
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