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为了探索金属与金属之间的化学键本质,对双核锇的配合物进行了单电子氧化,分离得到了一例双核锇的自由基阳离子配合物[Os_2Cp*_2(CO)_4]·~+,并进行了结构表征。通过对其进行电子顺磁共振光谱表征和理论计算,发现自旋密度主要位于配体上。单晶结构解析表明,双核锇的羰基化合物经过单电子后,金属间的键长几乎没有发生变化。同时在其与三苯甲基碳自由基阳离子的反应过程中,采取sp~3杂化的C—H键被活化。经推测,可能是通过electrochemical-chemical(EC)机理进行的。
In order to explore the nature of the chemical bond between metal and metal, single-electron oxidation of the dinuclear osmium complex was carried out and a free-radical cation complex [Os_2Cp * _2 (CO) _4] · + Structural characterization. Through the electronic paramagnetic resonance spectroscopy characterization and theoretical calculations, found that the spin density is mainly located in the ligand. Single crystal structure analysis shows that the binuclear osmium carbonyl compounds through a single electron, the bond length between the metal almost no change. At the same time in its reaction with the trityl carbon radical cation, take sp ~ 3 hybrid C-H bond is activated. Presumably, this may be through the electrochemical-chemical (EC) mechanism.