取代物

The QSAR model of multiple descriptors was established by the above parameters and the parameters of ...

在分类建模的基础上，又获得了仅包含1XV和EHOMO两个参数的55种取代苯系物的定量结构-活性相关模式。

The copolymers were systematically characterized by elementary analysis, FT-IR, UV-visible spectroscopy, solution high-resolution 〓H-NMR and solid-state high-resolution 〓C-NMR spectroscopes, solubility examination; circular dichroism technique was firstly used to characterize chain structure of the copolymers.

本文通过在刚性的PD聚合物分子链中引入邻乙氧基苯胺链节，使用化学氧化聚合和电化学氧化聚合两类新型聚合方法，合成了三种PD异构体与PHT的共聚物，并进行了聚合反应、结构和性能表征的系统研究，并且比较了氨基的相对取代位置对聚合活性的影响。

The Sm or Yb complexes were tested to be used as a catalyst for the Diels-Alder reaction of cyclopentadiene with methyl acrylate.

用α-亚磺酰基-N，N-二取代乙酰胺同三氯化钐和三氯化镱反应得到了相应的稀土配合物，用元素分析、红外光谱进行了结构表征。

When the reaction was carried out under the above optimum conditions, the conversion of mandelonitrile was 42 % and e.e.

在此基础上合成氰醇类底物，运用摸索的条件对其进行动力学拆分，并探讨了芳环上的取代基R对反应结果的影响。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。