取代基的影响较小，主链共轭结构对吸收光谱的影响明显。
In short, the influence of the substituents is insignificant. However, the remarkable effect was induced by the conjugated structure in the main chain.
芳基上取代基的位置和性质以及使用的溶剂都能够影响非对映体2r,4r和2s, 4r在溶液中的相对含量。
The relative contents of diastereomers, 2r 4r and 2s 4r, in solution are influenced by both the solvents used and the characteristics and locations of substituents on 2-aryl.
对所有共振谱线进行了全面归属，并讨论了不同取代基和环内不同杂原子对化学位移值的影响。
All of the resonance lines were fully assigned and the effects of substituents and heteroatoms in ring on chemical shifts were discussed.
根据取代基对各类质子化学位移变化的影响。
On basis of the effect of substituents on the variation of the chem.
在此基础上讨论了溶液中样品的结构、取代基对其结构、构象的影响和取代基的化学位移规律。
The structure of samples in solution, the influence of R-substitution on conformation, and the rule of R-substituted chemical shifts were discussed.
结果表明，苯环上取代基的种类及位置对化合物分子的共轭体系及共平面程度有较大影响。
The results indicate that the kind and position of the substituents in aniline ring greatly affected the conjugation system and coplanarity of the products.
芳环上取代基性质对产物分布的可调性具有重要的影响。
The properties of the substituents on aromatic ring would influence whether the product distribution could be controlled conveniently.
重点介绍了金属茂的合成方法及环戊二烯环上的取代基、溶剂对合成及分离旋光性金属茂的影响。
The synthesis of metallocene, the effects of substitution in cyclopentadiene ring, reaction medium for synthesis and separation of chiral metallocene have been highlighted.
作者认为影响聚合物等规度的因素主要是取代基的极性效应。
The tacticity of polymers is mainly influenced by the polarity of substituent group of vinyl monomer.
分析了芳环上取代基对氢重排的影响。
The effect of the substituents on the aromatic ring upon the hydrogen rearrangement was studied.
吡啶取代基的大小和空间位阻是影响相互作用方式的关键因素之一。
The size and steric hindrance of substituent of porphyrin is one of the crucial factors to affect the interaction between porphyrins and DNA.
首先测定了17种取代苯化合物对发光菌的急性毒性，初步探讨了苯环上不同取代基类型和取代位置对毒性的影响。
The acute toxicities of 17 substituted benzenes to Photobacterium Phosphoreum were measured, and the effects of substituted groups and positions on toxicities were discussed roughly.
研究表明配位键的强度不仅受取代基R的影响，而且还与环结构的变化有关。
The strength of the dative bond deponds not only on the substituents R, but also on the skeletal structure of the parent ring.
结果表明，对邻苯二甲酸酯类化合物而言，取代基的空间结构参数是影响受试物好氧生物降解性能的重要因素。
The result showed that the steric factors of substituents were important parameters affecting the aerobic biodegradability of the tested compounds.
本文还讨论了取代基对试剂性能影响的规律。
The rules of the influences of substituents to the properties of reagents were studied.
本文报道了以邻氯甲苯为原料，经光氯化、水解、取代三步合成2-甲酰基苯磺酸钠的方法，并对影响反应收率的因素进行了讨论。
Sodium 2-formylbenzenesulfonate was prepared from 2-chlorotoluene by photo-chlorination, hydrolysis and substitution reactions successively. Factors affecting the yields were discussed.
研究表明，芳醛上取代基不同对卟啉的合成、磺化和试剂的离解平衡等有一定的影响。
It was found that the substituent attached at the phenyl exerted influence on the yields of synthesis, on the experimental conditions of sulphonation and on the acid-base properties of the reagent.
根据紫外可见光谱和荧光光谱的数据，分析了不同取代基对其光谱性质的影响。
Based on UV spectral data and fluorescence spectral data, the effect of different substituents on spectral properties of the three days was presented and discussed.
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。
With increasing the electron withdrawing substituents in the phenoxy ring, the catalytic activity was increased, and the molecular weight of polyethylene decreased.
此外，还发现TPM染料所带的正电荷数以及取代基的体积是影响染料和G-四链体结合稳定性的两个重要因素。
Positive charges and substituent size in TPM dyes may be two important factors in influencing the binding stability of the dyes and G-quadruplexes.
并讨论了苯环上不同取代基对冠醚环上各碳化学位移的影响。
The influences of benzine ring's different sub-stituets on the chemical shifts of crown's carbons are also discussed.
此外，还研究了不同取代基和催化剂五羰基合钨对反应机理及反应位垒的影响。
In addition, the catalytic effect of W5 and substitution effect on the reaction mechanisms and reaction barriers have also been considered.
研究结果表明，三芳胺化合物的结构类型、取代基的性质、个数和位置对其光电性能均有不同程度的影响。
The results indicated that the type of the triarylamine, the property, number and locality of the substitutes have influences on the transportation of the carriers.
配体的中心骨架、功能末端基、取代基的位置及抗衡阴离子等因素对配合物的荧光强度均有较大影响；
The luminescent properties of the complexes are influenced by the skeleton structure, terminal groups, the different position of the substituents of the ligands and the counter anions.
结论甾醇结构中的24位取代基影响甾醇的吸收。
Conclusion 24-substituent of sterol affects the absorption of sterols.
目的研究4（2 0 ）双键5 / 7/ 6型紫杉烷类二萜化合物的质谱裂解特征，以及取代基种类及位置对质谱裂解的影响，探讨该类化合物的质谱裂解规律。
AIM To investigate the fragmentation behavior of three 4(20) methylene 5/7/6 type taxoids, and the influence of types and positions of the substituents on fragmentation.
利用ZINDO/SOS方法，从理论上研究了对称和不对称取代两种情况下，取代基对二噻吩并噻吩衍生物单双光子吸收性质的影响。
In order to investigate the effect of substituents on the two-photon absorption properties(TPA), the one-and two-photon absorption properties were theoretically studied by using ZINDO/SOS method.
研究发现，无论对于吸电子取代基还是供电子的取代基对烯基亚砜的活性都没有任何影响，而邻甲基苯醌前体化合物中所带有的吸电子基团能增加其反应活性。
It was found that both the electro-withdraw and electro-donating substituents have no effect on reaction activity and the electro-withdraw substituents can increase the reaction activity.
结果表明，尽管这些二甲基萘的电离能基本相同，但因取代基位置不同使分子中电荷分布不同，从而影响了激基复合物的形成能力。
Although the ionization potentials of dimethyl naphthalenes used was almost the same yet the charge distribution was different due to the different positions of two methyl groups on naphthalene. Th…
结果表明，尽管这些二甲基萘的电离能基本相同，但因取代基位置不同使分子中电荷分布不同，从而影响了激基复合物的形成能力。
Although the ionization potentials of dimethyl naphthalenes used was almost the same yet the charge distribution was different due to the different positions of two methyl groups on naphthalene. Th…
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