通过电子转移的氧原子转移反应中的单核非血 (III) -水化合物
Namita Sharma1, Huai-Bo Zou1,2, Yong-Min Lee1
1Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.
Journal of the American Chemical Society
|January 13, 2021
概括
这项研究报告了氧原子从水复合物转移到有机基质的第一个实例. 水复合物有助于OAT反应,与其氧对应物不同,为金属中介氧化提供了新的见解.
科学领域:
- 无机化学
- 有机金属化学
- 反应机制
背景情况:
- 已知金属氧复合物可以进行氧原子转移 (OAT) 反应.
- 在各种化学转化中,OAT反应至关重要.
- 之前没有报告金属水复合物的OAT.
研究的目的:
- 报告来自单核非血Mn (III) -水化合物的OAT的第一个实例.
- 研究OAT从Mn (III) -水复合物到有机基质的机制.
- 为了比较Mn (III) - 水复合物的反应性与其Mn (III) - 水氧对应物.
主要方法:
- 单核非血Mn (III) -aqua和Mn (III) -hydroxo复合物的合成和表征
- 停止流动的短暂吸收光谱检测反应中间体.
- 动力学研究以确定反应速率和机械路径.
- 马库斯理论用于分析电子转移过程.
主要成果:
- (III) - 水复合物,[dpaq) MnIII(OH2) 2+,可以成功地与和衍生物进行OAT.
- 没有观察到类似的Mn (III) - 复合物,[dpaq) Mn (III) ]+ (OH) 的OAT.
- 机理学研究显示OAT通过从基质到Mn (III) -水复合体的初始电子转移进行.
- 检测到 thioanisole 衍生物的基离子中间体,支持拟议的机制.
- 电子转移速率常数与马库斯理论的预测一致.
结论:
- 单核非血Mn(III) -水复合物可以调解OAT反应,扩大已知的复合物范围.
- 水性联体在启用OAT中起着至关重要的作用,使其与化合物区分开来.
- 反应机制涉及外层电子转移,随后是导致产品形成的后续步骤.
- 这项研究为研究金属与水之间的氧化反应提供了一个新的平台.
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