查询词典 Salen

One of them can efficient catalysed the alkene in the absence of dear additives by introducing an imidazole in the salen ligand.

其中分子内含咪唑的手性吡咯烷Mn催化剂成功实现了不加昂贵添加剂的情况下高效催化取代色烯环氧化反应。

Ms Salen is, in effect, seeking to mechanise Bank Street's methods by transferring much of the pedagogic effort from the teachers themselves (who will now act in an advisory role) to a set of video games that she and her colleagues have devised.

在实际行动中，萨伦女士希望将银行街的经验程序化，通过一系列她和同事开发出来的电子游戏来取代教师在教学中的作用，教师的角色将变为咨询顾问。

Some 16,000 skiers took part in the 56 mile ski race between Salen and Mora.

约16 000名滑雪爱好者参加了56英里的萨伦和莫拉滑雪比赛。

Schiff base matel complexes are of great importance in the field of catalytical study, bioinorganic chemiestry, coordination chem...

金属Schiff base（手性Schiff base一般称为Salen）配合物的研究，在催化研究、生物化学、配位化学、超分子化学等领域具有十分重要的意义。

Finally, two tetranuclear Cu~(2+) complexes were constructed from a new salen ligand with alkoxo groups. The two complexes were obtained by the reaction of the same ligand with Cu~(2+) in different solvents, i.e., a stage tetranuclear complex and a pseudo-cubane tetranuclear complex in MeOH and THF, respectively.

最后，本文以Schiff碱类过渡金属配合物发展应用为研究背景，设计并合成了一种新型Schiff碱及其两种构型的Cu金属配合物，发现所设计的具有和三个Schiff碱配体，与Cu_2在不同的反应溶剂中进行配位反应时，可以得到不同结构的配合物。

Chiral SalanCrX complexesa saturated version of SalenCr(ⅢX are designed,and in conjunction with an ionic quaternary ammonium salt or organic strong base can efficiently catalyze the asymmetric,regio-and stereoselective alternating copolymerization of CO_2 with rac-PO at mild conditions to afford isotactic-enriched polycarbonates with～95%head-to-tail linkages and moderate enantioselectivity.

本论文在Salen构型配体的基础上，设计合成了一系列手性Salan型铬配合物，并将其与季铵盐/有机强碱组成亲电-亲核双组分催化体系，在室温下可以有效的催化CO_2和环氧丙烷的不对称交替共聚反应，实现了CO_2和环氧丙烷的不对称交替共聚反应的区域和立体化学控制，得到95%的头尾连接单元和中等光学纯度(对映体过量值ee%≈70%)的全同结构的聚碳酸酯。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新