呈现旋转交叉和C-H键激活的Co(III) imidos
Evan R King1, Graham T Sazama, Theodore A Betley
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
这项研究详细介绍了一种-伊米多复合物,该复合物表现出热诱导的旋转交叉. 研究人员还通过C-H激活合成了一种金属环印,展示了化学中的新型反应性.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 无机化学 无机化学 有机化学
背景情况:
- 复合物是多用途的催化剂和合成中间体.
- 伊米多配体在过渡金属化学中起着至关重要的作用.
- 了解旋转交叉现象是开发先进材料的关键.
研究的目的:
- 为了合成和表征新的三坐标的 - 像素复合体.
- 为了研究一个 - 像素复合体的旋转交叉行为.
- 探索 - 胺基复合物的反应性,包括C-H激活.
主要方法:
- 使用 tert-butyl azide 和 mesityl azide 合成-imido 复合物.
- 可变温度 (VT) 1H NMR光谱学用于研究旋转状态.
- VT晶体学用于确定与温度有关的结构变化.
- 测量磁感应度以量化旋转状态.
主要成果:
- 一个具有三坐标的偏磁性 - 胺基复合物的分离, ((Ar) L) Co(N(t) Bu).
- 从单个 (S=0) 到五重奏 (S=2) 状态的热诱导旋转交叉的观察.
- 通过基C-H激活合成一个S=1终端的imido复合体,并将其转化为金属环印林.
结论:
- 合成的-伊米多复合体显示了可调节的自旋状态,这与分子开关有关.
- 基C-H激活由 - 伊米多复合体提供了一个新的途径,以异环化合物.
- 这项工作扩大了对 imido 连接体化学和反应性的理解.
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