substituent effect

The DFT Study of VO ( pa)_2 Complex and Substituent Effect on py

VO（pa）2配合物及py上取代基效应的DFT研究

An equation correlating the electronic transition energy with substituent and solvent effect in aromatic conjugated systems was derived on the basis of perturbation molecular orbital theory.

推导出芳香共轭体系的电子跃迁能与取代基效应以及溶剂效应之间的关系方程式。

Regression analysis and test of significance showed that it can well interpret the relationship between substituent and~ ( 13) C NMR based on the number of valence electrons and mulliken charge, and interpret the contribution of conjugated effect.

回归分析及显著性检验表明，根据原子的价电子数和电荷，能够很好地解释化学位移与取代基之间的变化规律，且能够较好地考虑共轭效应的影响。

The spectroscopic properties of HBQ and its derivatives were investigated. We have mainly focused our discussion on the substituent effect and solvent effect.

对10-羟基苯并喹啉及其衍生物的光谱性能进行了分析研究，重点考察取代基效应和溶剂效应。

The degree of branch structure is related to the ion-pair, which is the substituent group connected to N atom in alkyne, and the steric effect of the Lewis Base. The branch structure can be restrained by controlling the chain transfer reaction.

其支化程度与离子对的结构，即炔酰胺上N原子相连取代基和路易斯碱的位阻大小有关，可通过对链转移反应的抑制控制支化程度。

Study on Substituent Effect of Ruthenium(ⅱ) Tris 1, 10 Phenanthroline Complexes by 13 C NMR Spectra

用~（13）C-NMR研究菲咯啉钌配合物的取代效应