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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis and electrochemical behavior of mixed organoboron/organomercury compounds
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Synthesis and electrochemical behavior of mixed organoboron/organomercury compounds

机译:混合的有机硼/有机汞化合物的合成和电化学行为

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摘要

As part of our ongoing interest in the synthesis and reduction chemistry of organoboron species, we have investigated the synthesis of mixed organoboron/organomercury complexes by reaction of the Li(THF)_ 4 salt of dimesityl-1, 8-naphthalenediylborate with 1, 2-(HgCl)_ 2C_ 6F_ 4 and 1, 3-(HgCl)_ 2C_ 6F_ 4, respectively. The resulting tetranuclear B_ 2Hg_ 2 complexes (2 and 3, respectively) were characterized by multinuclear NMR spectroscopy and single-crystal X-ray analysis. The cyclic voltammogram of complex 2, which features a B-Hg-Hg-B core connected by an ortho-phenylene (Hg-Hg connection) and two peri-naphthalenediyl linkers (B-Hg connection), shows significant coupling of the two electroactive boryl units, presumably via a direct σ interaction of the vacant p orbitals of the four neighboring Lewis acids. This conclusion is supported by DFT calculations, which show that the LUMO of 2 spans the four Lewis acids, with a major in phase contribution from the boron 2p orbitals and the mercury 6p orbitals.
机译:作为我们对有机硼物种合成和还原化学的持续关注的一部分,我们研究了由Dimesityl-1、8-萘二基硼酸酯的Li(THF)_4盐与1,2反应生成的有机硼/有机汞混合配合物。 -(HgCl)_2C-6F_4和1,3-(HgCl)_2C_2F_4。通过多核NMR光谱法和单晶X射线分析对所得的四核B_2Hg_2复合物(分别为2和3)进行表征。配合物2的循环伏安图具有一个B-Hg-Hg-B核,该核通过邻亚苯基(Hg-Hg连接)和两个萘二萘基连接体(B-Hg连接)连接,显示出两个电活性物质的显着耦合硼基单元,大概是通过四个相邻的路易斯酸的空位p轨道的直接σ相互作用。该结论得到DFT计算的支持,DFT计算表明2的LUMO跨过四个路易斯酸,其中硼2p轨道和汞6p轨道具有重要的相位贡献。

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