在MnIII-Alkylperoxo复合体上调查连接体球扰动
Samuel A Brunclik1, Elizabeth N Grotemeyer1, Zahra Aghaei1
1Department of Chemistry and Center for Environmentally Beneficial Catalysis, University of Kansas, Lawrence, KS 66045, USA.
Molecules (Basel, Switzerland)
|April 27, 2024
概括
新型复合物与新配体激活过氧化用于碳化合物的氧化. 修改连接体球增强了反应性并改变了O-O键裂解路径,为催化剂机制提供了洞察力.
科学领域:
- 协调化学 协调化学
- 催化剂是一种催化剂.
- 有机合成 有机合成
背景情况:
- 催化剂激活过氧化以进行选择性碳化合物氧化.
- 一个拟议的机制涉及 (III) - 水和Mn (V) - Oxo中间体.
- 由于特征性Mn(III) - 基氧物种的稀有性,Mn(III) - 基氧复合物被研究.
研究的目的:
- 为了合成和表征新型-烯复合物.
- 研究连接体球体修饰对催化活性和O-O键裂变的影响.
- 了解影响水氧中间体的热稳定性和反应性的因素.
主要方法:
- 新型含胺的五酸联体 (dpaq5NO2) 的合成.
- (III) - 基氧复合物的制备和表征.
- 光谱方法和密度函数理论 (DFT) 计算.
- 单晶X射线晶体学用于结构确定.
主要成果:
- 合成了两个室温稳定的Mn(III) - 基氧复合物.
- 结构性表征的Mn (II) 和Mn (III) - 氧复合体证实了连接体协调.
- 带球扰动显著增加了对有机基质的反应性.
- 观察到O-O键裂解途径 (同解与异解) 的适度变化.
- 热稳定性在很大程度上保持不变,尽管反应性有所改变.
结论:
- 新的连接体系统支持稳定的Mn(III) - 基氧复合体.
- 连接体球中的电子修饰有效调整催化剂的反应性.
- 这项工作为在中介氧化中O-O键裂解的机制提供了宝贵的见解.
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