查询词典 alder

To attaining longlived charge separated states, the new compounds 7 and 8 of C60-S-2-thioxo-1, 3-dithioles derivatives were synthesized by Diels-Alder cycloaddition reaction. The structures generated by AM1 were used as the initial configurations for the density functional optimization at the B3LYP/3-21G level for all carbon and sulfur clusters, and some geometry conformation indexes were obtained. We found that C60 has been half-packed by the curved 2-thioxo-1, 3-dithioles derivatives.

为了获得具有长寿命电荷分离态的[60]富勒烯－富硫衍生物有机功能分子，我们设计了用单键硫桥键联[60]富勒烯和硫酮衍生物的分子7和8，用半经验AM1方法得出最低能量的几何结构，在此基础上用密度泛函 B3LYP/3-21G方法，对其进行计算，得出电子相关的优化参数，预测其稳定性。

Maleopimaric acid can be synthesized by Diels-Alder reaction from rosin and maleic anhydride by phosphato-molybdic acid .

以杂多酸磷钼酸为催化剂合成了马来海松酸。

A noteworthy one is that we have obtained the Fukui function and local softness of πbond region for the first time, only by which we can explain and predict theregioselecitivity of Diels-Alder reaction etc.

可见原子-键电负性均衡方法中的σπ模型不仅具有简便易行的优点，而且得到的各种反应标度或稳定性指标具有计算简便、概念直观、易于使用等特点。

Synthesis of tricyclopentadiene Two methods of polymerization were analyzed in the synthesis of TCPD: thermal polymerization of DCPD, Diels-Alder reaction of DCPD and cyclopentadiene.

三环戊二烯的合成采用两种方式对TCPD的合成进行了研究：DCPD直接热聚法、DCPD与环戊二烯双烯加成法。

It is widely used in the abroad, but there is no manufacture factory demestic.Dimethyl benzene as solvent, Hexachlorocyclopentadiene react with 1,5-cyclooctadiene by the Diels-Alder reaction, this is the common method to prepare DCRP.

得克隆即双环辛烷，含有脂环族氯，它是一种性能优异的阻燃剂，在国外正得到广泛的重视和应用，但目前我国还没有研制和生产厂家。

It is widely used in the abroad, but there is no manufacture factory demestic. Dimethyl benzene as solvent, Hexachlorocyclopentadiene react with 1,5-cyclooctadiene by the Diels-Alder reaction, this is the common method to prepare DCRP.

得克隆即双环辛烷，含有脂环族氯，它是一种性能优异的阻燃剂，在国外正得到广泛的重视和应用，但在我国还没有生产厂家。

Furthermore, the effects of ligands, metal and reaction time on the reaction were also researched, and the process of new ligand-metal catalysis for Diels-Alder reaction was also analyzed according to Evans" square planar mode and Corey"s tetrahedral manner.

我们对影响配体对映选择性能的各种因素，如配体结构、金属离子、反应时间等进行了研究，而且根据Evans的平面四方形模式与Corey的四面体过渡态理论为新配体—金属配合物催化的该反应提出了可能的反应机理，并对产物的优势构型作了理论分析。

This dissertation is concerned with the approaches to a new high density liquid fuel, tetrahydrotricyclopentadiene, which can be synthesized with dicyclopentadiene as raw materials by three steps: Diels-Alder reaction, separation and hydrogenation. The main points of the paper are listed as follows.

本文以双环戊二烯为原料，通过双烯加成、分离、加氢反应得到目的产物——新型高密度液体燃料四氢三环戊二烯，主要研究内容包括： 1。

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。

This dissertation is concerned with the approaches to a new high density liquid fuel , tetrahydrotricyclopentadiene, which can be synthesized with dicyclopentadiene as raw materials by three steps: Diels-Alder reaction, separation and hydrogenation.

本文以双环戊二烯为原料，通过双烯加成、分离、加氢反应得到目的产物——新型高密度液体燃料四氢三环戊二烯，主要研究内容包括： 1。三环戊二烯的合成采用两种方式对TCPD的合成进行了研究：DCPD直接热聚法、DCPD与环戊二烯双烯加成法。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。