Generation and Structure of Stable Aromatic Dications Incorporating Catecolate Metal Complexes

本工作的目的是通过在分子中掺入铂儿茶酚酸络合物来生成稳定的指示种类的芳香族化合物。结果表明，由脱氢苯并[12]环烯核组成的铂-儿茶酚配合物及其双电子氧化生成的指示物质是稳定的。同样，具有8-pi体系的配合物以及具有二苯并环己四烯核心的6-pi体系的配合物也很稳定。这些结果表明，本方法可用于稳定难以生成的芳香指示物质。然而，以联苯为核心的catecolate金属配合物由于其不稳定性而没有被分离出来，显示出该方法的局限性。

The purpose of this work is to generate stable dicationic species of aromatic compounds by incorporating platinum catecholate complex moieties in the molecules. The platimun catecol complex with 12-pi system consisting of a dehydrobenzo[12]annulene core turned out to be stable as well as its dicationic species generated by two-electron oxidation. Similarly, the complex with an 8-pi system as well as its dication with a 6-pi system having a dibenzocyclooctatetraene core were also stable. These results indicate that the present method is useful to stabilize aromatic dicationic species which are otherwise difficult to generate. However, the catecolate metal complex with a biphenylene core was not isolated because of its instability, showing a limitation of this method.