基与四基酸协调和基基酸相互作用在金属中的绑定烯研究
William J Evans1, Jeremy M Perotti, Jason C Brady
1Department of Chemistry, University of California, Irvine, California 92697-2025, USA. wevans@uci.edu
Journal of the American Chemical Society
|April 24, 2003
概括
新结合的烯环二烯连接物形成未溶解的金属. 这些复合物表现出独特的氨酸协调和反应性,在氨酸聚合催化中显示出潜力.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 催化剂是一种催化剂.
背景情况:
- 连接的烯酸环二烯联体为金属复合提供独特的结构和电子特性.
- 金属在催化过程中至关重要,特别是在烯聚合过程中.
- 了解连接体设计是控制金属中心反应性的关键.
研究的目的:
- 为了合成和表征新型的未溶解金属含有绑定的烯酸环丁烯酸联体.
- 研究这些新复合体的结构特征和协调行为.
- 探索这些金属的反应性,特别是与催化有关.
主要方法:
- 合成绑定的烯酸环丁酸盐.
- 与兰化二化物复合物的反应形成金属 (Sm,Eu,Yb).
- 用X射线晶体学来确定固态结构.
- 与二氧化碳和银四乙酸盐的反应以探测反应性.
主要成果:
- 成功合成了未溶解的金属 [C 5 Me 4 Si Me 2 CH 2 CH = CH 2 ] ] 2 Ln (Ln = Sm, Eu, Yb).
- 固态结构显示了以金属中心为导向的绑定烯酸.
- 复合物1 (Samarium) 减少性地合CO2以形成一个氧酸盐桥接二聚体.
- 复合物1形成了一个未溶解的子,在对照子和悬挂子之间有竞争的协调.
结论:
- 这种新型的绑定烯联体促进了稳定,未溶解的金属的形成.
- 连接的烯酸离金属中心的近距离会影响反应性.
- 这些复合物由于其可调节的协调环境,在烯聚合过程中具有作为催化剂或前催化剂的潜力.
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