在一个高度不和的-集群复合体中,光可逆的多重添加
Richard D Adams1, Burjor Captain, Chad Beddie
1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. adams@mail.chem.sc.edu
Journal of the American Chemical Society
|January 25, 2007
概括
这项研究合成了一种-集群化合物,该化合物连续添加. 集群可以在紫外线下释放,为金属部位的激活提供了洞察力.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 材料科学 材料科学 材料科学
背景情况:
- 新型金属集群的合成对催化和材料科学至关重要.
- 了解不和金属集群与气等小分子的反应性是一个关键的研究领域.
研究的目的:
- 为了合成和表征一种新的-集群化合物.
- 为了研究这个星团对的连续添加.
- 探索电子结构和激活机制.
主要方法:
- 通过Re2(CO) 10和Pt(PBut3)2.3的反应合成Pt3Re2(CO) 6(PBut3) 3.
- 在受控条件下,集群的顺序化.
- 使用光谱和晶体学方法 (隐含) 进行化产品的表征.
- 密度函数理论 (DFT) 计算用于研究电子结构和反应机制.
主要成果:
- 一个三角形双形Pt3Re2集群 (1) 被合成.
- 复合 1 顺序加起来得到 3 等同. 的形成Pt3Re2 ((CO) 6 (((PBut3) 3 (((μ-H) 2 (2),Pt3Re2 ((CO) 6 ((PBut3) 3 (((μ-H) 4 (3),和Pt3Re2 ((CO) 6 (((PBut3) 3 (((μ-H) 6 (4).
- 在化过程中观察到一种动态同位素效应 (kH/kD = 1.3).
- 化合物 2-4 具有桥接化连接物.
- 紫外线照射诱导了从4到3到2的逐步脱.
- DFT计算为电子结构和潜在的激活机制提供了洞察力.
结论:
- Pt3Re2星团表现出可逆的添加和释放行为.
- 该研究提供了在多中心金属部位的激活的证据.
- 这些发现有助于理解不和金属集群中的反应性.
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