Diborenium and Diborynium Cations: Combining Hypovalency, Multiple Bonding, Positive Charge and Unpaired Electrons

具有硼-硼多键的化合物通常是高度富含电子的物种和强还原剂。然而，我们发现了一些有趣的阳离子化合物，它们含有不同程度的B-B多键，即二硼(一/二)阳离子和自由基阳离子。这些化合物结合了一系列看似不相容的性质，如低价、多键、正电荷和未配对的电子。因此，它们是令人着迷的基础研究对象，而它们同时具有富含电子和缺乏电子的特性，可能使它们成为强大的主基双亲分子，具有激活惰性小分子的能力。本项目旨在探索这些阳离子的合成范围以及它们丰富的进一步反应活性。

Compounds with boron-boron multiple bonding are generally highly electron-rich species and strong reductants. However, we have discovered a number of intriguing cationic compounds that contain varying degrees of B–B multiple bonding, namely diborenium (mono/di)cations and radical cations. These compounds combine a range of seemingly incompatible properties such as hypovalency, multiple bonding, positive charge and unpaired electrons. Thus, they are fascinating subjects for fundamental investigation, while their simultaneous electron-rich and -poor character potentially makes them powerful main-group ambiphiles with the ability to activate inert small molecules. This project aims to explore the synthetic scope of these cations as well as their rich further reactivity.