In case of the alkaline solution, benzene ring tended to being more perpendicular while pyrine ring parallel to the silver surface. 碱性条件下,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 substituent effects ( the electronic effect, steric effect and position of substituted groups) on the benzene ring were investigated. 计算的取代基效应与有机电子论的预测相一致。
A benzene ring can also be thought of as a short chain of six such carbon atoms, with alternating bonds, biting its tail to form a closed loop. 苯环可以看成是由六个这种碳原子所组成的短链,它们的单双键交替,并且头尾相连形成一个封闭圈。
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碱度,因此减弱了其对金属离子的络合能力。
Study of Nucleophilic Substitution Reaction of C-F Bond on a Benzene Ring under Activation of Hydrogen Bond PREPARATION OF CHITOSAN IMMOBILIZED WITH β-CD AT C_6 POSITION BY A NUCLEOPHILIC DISPLACEMENT REACTION 氢键活化的苯环上C-F键的亲核取代反应研究亲核取代法制备壳聚糖6-OH固载环糊精衍生物
The benzene ring itself is not susceptible to low-temperature oxidation, but its substitution into a paraffinic chain increases the response of the latter. 苯环本身对低温氧化并不敏感,但当它取代进入烷烃链后,将增加链对低温氧化的响应。
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。
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。
The results showed that the toxicity of the halogenated benzene compounds to the river bacterium was correlated with the kinds, quantity and position of substituents in benzene ring. 结果表明,卤苯类化合物对江水细菌的毒性与苯环上取代基的种类、数目和位置有关。
The bigger the hydrophilicity of the substitute attached to the benzene ring, the bigger the acute toxicity; 苯环连接的取代基亲水性越大,毒性越大;
Simulating result shows that benzene ring, carbonyl group, aldehyde group, conjugated double bond and the function between bond and chain are the important reason for the exist of traps in polymers. 模拟结果表明聚合物中苯环、羰基、醛基和共轭双键等化学键及键和链的作用是空间电荷陷阱存在的重要原因。
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著的影响;
PH strongly influenced the electrochemical reduction characteristics of the nitrobenzene compounds at the copper electrode, and it mainly depends on the properties of the substituents on the benzene ring, their configurations and numbers, and their location versus nitro group on the benzene ring. pH对不同的硝基苯类物质在铜电极上的电还原特性有不同程度的影响,这主要取决于苯环上其它取代基的性质、结构、数量和它与硝基在苯环上的相对位置。
~ 1H-NMR and UV analysis show that, after reaction, benzene ring in the structure unit of the alkali lignin is steady, carboxyl, carbonyl and methoxyl all have reduced in different extent, while aliphatic and phenol hydroxyl have increased. ~1H-NMR和UV光谱分析显示反应后碱木质素的结构单元中苯环结构稳定,羰基、羧基、甲氧基有所减少,醇羟基和酚羟基的量增加了。
HALOGENATION REACTION ON BENZENE RING Application and Synthesis of Sulfide Phenyl Trifluoromethyl 关于苯环上的卤代反应三氟甲基苯硫醚的制备和应用
It is found that the conjugated plane made up of the amine group and benzene ring is of the active position, and HOMO and LUMO of eight compounds are π-molecular orbital with lone pare electron. 研究表明,这些添加剂胺基和苯环形成的共轭平面构成了活性部位,其HOMO和LUMO均为π-分子轨道。
In additional, the pigment's color and λ max is related to the properties and position of substituting group on benzene ring. 颜料颜色的深浅和λmax与苯环上取代基的性质、位置密切相关。
UV spectra indicated that benzene ring structure of organic chlorine was distributed completely after photocatalytic degradation. 通过紫外光谱图对4-氯-愈创木酚的降解进行跟踪,结果表明,氯化有机物中的苯环特征峰完全消失,降解较彻底。
In order to compare the inhibitive effects of different substitute methoxy groups in benzene ring, another type compounds 2.10 were designed and synthesized. 其次,为了比较苯环上不同甲氧基取代对活性的影响,我们在化合物类型2.8的基础上设计合成了化合物类型2.10。
The results showed that with the increasing of substitute degree, the steric effects of benzene ring appear gradually. 研究结果表明随着苯氧基取代程度的增加,苯环的空间位阻效应逐渐显现。
It shows that after the substituted in benzene ring, the rate and conversion of the reaction were enhanced. 研究表明,苯环上有溴原子取代后,肼解反应和缩合反应的速率和转化率都有所增强。
In addition, compared to other peaks relative intensity changes, discovery of lignin benzene ring compounds content reduced. 另外对比其它谱峰相对强度的变化,发现木质素中苯环等环状化合物含量减少。
Five kinds of organic-inorganic hybrid functional materials were prepared from isocyanate silane and aromatic amine compounds with benzene ring or amino amyl alcohol compound without benzene ring. 本论文利用异氰酸硅烷和含有苯环结构的芳香胺类化合物以及不含苯环结构的氨基戊醇化合物合成了五种有机-无机杂化功能材料。
In polymer molecular chain leading into anion type sulphonate group with strong hydration high active and large lateral group double bond compounds containing benzene ring. Through large mummers of experiments, a new kind of anti-salt multivariate polymer PBS has been synthesized. 在聚合物分子链中引入阴离子型强水化高活性磺酸基团和大体积侧基含苯环的双键化合物,通过大量实验研究,合成了新型抗盐丙烯酰胺类多元聚合物PBS。
As a result, in this paper, we designed fluorinated acrylate monomers: 1a, 1b, 2, which contained a benzene ring. 因此,在本论文的含氟单体设计中,引入了刚性的芳香环,设计了三种含有苯环的含氟丙烯酸酯单体1a,1b和2。
Some aromatic products were formed after the aliphatic chain was attacked by hydroxyl radical, and then were broken up into fatty compounds through the benzene ring, such as formic acid, acetic acid and acetaldehyde. 当·OH自由基攻击脂肪链时形成一些芳香类中间产物,并进一步通过苯环破裂形成脂肪化合物如甲酸,乙酸和乙醛的反应等。
This might imply that the benzene ring and branched-chain, cyclic alkanes can promote combustion, reducing the generation of SOF. 这说明苯环和支链、环状烷烃能促进燃烧,减少SOF的生成。
Replacing the benzene ring with the naphthalene ring, naphthofuran was obtained. 将苯环换为萘环,可得到萘并呋喃类化合物。
In contrast, the benzene ring exhibits anti-aromaticity in the stationary points of the C-H bond activation mechanism. 相反,在C-H键活化机理中,所有驻点中的苯环均保持反芳香性。