a closed chain of 6 carbon atoms with hydrogen atoms attached

benzene ring in benzocrown ether has electron receptor effect can reduce complex ability to metal ions because of weakling the basicity of crown ether.

苯并冠醚的苯环具有很强的吸电子效应，降低了冠醚环上醚氧的堿度，因此减弱了其对金属离子的络合能力。

because of the weakened conjugated actions between the carbon-carbon double bonds in the benzene ring and its strong strain in molecule, 5,6,9,10- tetradehydrobenzocyclooctene decomposes easily.

结果表明5，6，9，10-四脱氢苯并环辛烯分子平面刚性结构，可能稳定存在，但由于苯环共轭性的削弱和较高的张力，使得它易于分解。

synthesis and characterization of poly(amidoamine)(pamam) dendrimers are conducted by taking the benzene ring as nucleus.

合成了以苯环为核的一类端胺基树枝状化合物，并对其进行了表征。

alteration of two vibration modes of benzene ring of the drug shown by difference spectroscopy gives evidence of the insertion of benzene into acidic phospholipid bilayer.

观察到反映苯环两种不同振动的特征振模在药物同磷脂作用过程中发生的不同变化，从而获得较直接的证据说明药物的苯环插入脂双层。

the synthesis methods of chalcone and benzene ring alkylation are discussed.

探讨了苯环上烃基化的条件以及查尔酮合成方法和条件。

the influence of temperature on yield and colour of product in bromination of benzene ring as well as the influence of bromine feeding speed on yield of brominated sidechains were investigated.

考察了反应温度对苯环上溴代产物收率和色泽的影响以及溴素滴加速度对侧链光溴代产物收率的影响。

methods the structure modifications on benzene ring and the coupling chain of the curcumin were summarized on the basis of published literatures for curcumin.

方法根据关于姜黄素及其衍生物的研究开发现状的多篇相关文献，对姜黄素的苯环和中间连接链的结构改造特点进行整理和归纳。

these results showed that the change of end substituents x and side substituent y of benzene ring in the molecules had important effects on mesogenic properties of these liquid crystalline compounds.

结果显示分子中末端烷氧基链长的变化和苯环侧向取代基y对这些液晶化合物的介晶性有重要影响。

oxidizing sidechain alkyl of benzene ring is one of the most important reactions in the organic synthesis.

苯环侧链氧化是有机合成反应中的重要反应类型之一。

results we obtained the epoxidation products of phenyl epoxy ethane. that with substituent on the benzene ring has higher yield, and that the substituent at 5-have higher yield than at 3-.

结果产物中有环氧化产物苯基环氧乙烷，催化剂苯环上有取代基的环氧化物产量高，取代基在5-位上的比在3-位上的环氧化物产量高。

the experimental results show that the azo group and benzene ring have marked influence on biodegradability;

实验结果表明：实验染料结构中的偶氮基和苯环对染料的可生化性有显着的影响；

pbzt is a rigid rod polymer, its molecula chain is consisted by benzene ring and hybrid benzene ring. pbzt film is extruded from pbzt/msa anisotropic solution.

聚对-亚苯基苯并二噻唑（pbzt）的取向薄膜是由苯环及苯杂环组成的直棒状刚性大分子组成。

in recent years, more and more scientists modify the double bond or benzene ring of resveratrol to get higher active, lower toxicity derivates.

近年来越来越多的科学家对其进行结构改造以得到高活性化合物，例如对双键、苯环的修饰。

when the substituent at the benzene ring and the n atom of aniline, the hdac inhibition activity is different from that of saha.

阳性对照药saha结构中的苯环取代和苯胺上的氮取代，使hdac抑制活性降低。

there is the larger dihedral angle between benzene ring and nitro group, which is the common experimental phenomenon and has been clarified with the electronic theory in this paper.

本文还从实验和理论上阐明了硝基与芳环间存在较大夹角是分子结构中的常见现象。

the hydrophobic property of the resin has remarkably improved by adding the hydrophobic group of benzene ring to the molecular structure of the resin.

在分子结构上引入憎水基-苯环后，显着提高了脲醛树脂的耐水性。

in case of the alkaline solution, benzene ring tended to being more perpendicular while pyrine ring parallel to the silver surface.

堿性条件下，分子的吸附位点不变，比林环呈平行取向，而苯环倾斜于银表面。

the activity was better when the amino side chain on the benzene ring was flexible, and without rigid ring closing to amino;

当苯环上的氨基侧链为柔性链，且不在紧邻氨基处接刚性环时，活性都较好；