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七十年代以来,已有许多关于锡与过渡金属成键的金属有机化合物的研究,但是锡与稀土成键的化合物未见报道。为进一步研究稀土元素参与形成的金属-金属键化合物的性质与结构,我们合成了从钇、镧到铽八个轻稀土元素与三苯基锡成键的化合物,并且对其价键状态与电子结构做了初步分析。从镝到镥六个重稀土元素在相同的实验条件下未得到预期的化合物。这可能是因为稀土元素中f电子的充满程度增大对成键不利的原因。反应方程式为
Since the 1970s, there have been many studies on tin and transition metal bonding of metal organic compounds, but tin and rare earth bond bonding compounds have not been reported. In order to further study the properties and structures of the metal-metal bond compounds formed by rare earth elements, we have synthesized eight light rare earth elements with triphenyltin from yttrium, lanthanum and terbium, Structure made a preliminary analysis. Six heavy rare earth elements from dysprosium to 未 did not give the expected compounds under the same experimental conditions. This may be attributed to the unfavorable bonding of f-electrons in rare earth elements. The reaction equation is