Cyclic (alkyl)(amino)carbenes with a 1,1'-ferrocenediyl backbone

环状（烷基）（氨基）卡宾（CAAC）表现出比经典的“Arduengo型”N-杂环卡宾（NHC）显著更显著的两亲性，因此能够在温和条件下活化基本上重要的小分子，例如CO和NH 3。具有1，1 '-二茂铁二基骨架的N-杂环卡宾（fcNHC）在这方面与CAAC类似，因为它们显著的两亲性以及因此的高反应性对于NHC是非常不寻常的。在这个项目中，两种类型的特别是两亲性卡宾，即CAAC和fcNHC，将被合并。该项目旨在获得具有1，1 '二茂铁基骨架的环状（烷基）（氨基）卡宾（fcCAAC），并研究它们的空间和电子特性以及它们的反应性。关于既定的CAAC的差异将特别令人感兴趣。根据我们的假设，fcCAAC将表现出特别明显的两亲性，因此特别高的反应性。因此，我们将专门研究它们的小分子活化能力-预计fcCAAC上级已建立的CAAC的任务。此外，我们推测，稳定（金属-）自由基的能力，这是典型的CAAC，可能会显着加强的存在下，氧化还原活性的1，1 '-二茂铁骨架，获得新的稳定的寡自由基。

Cyclic (alkyl)(amino)carbenes (CAACs) exhibit a significantly more pronounced ambiphilicity than classic “Arduengo type” N-heterocyclic carbenes (NHCs) and are thus able to activate fundamentally important small molecules such as, for example, CO and NH3 already under mild conditions. N-heterocyclic carbenes with a 1,1’-ferrocenediyl backbone (fcNHCs) are similar in this respect to CAACs, since their pronounced ambiphilicity, and hence high reactivity, is quite unusual for NHCs. In this project, both types of particularly ambiphilic carbenes, viz. CAACs and fcNHCs, will be combined. The project aims at gaining access to cyclic (alkyl)(amino)carbenes with a 1,1’ferrocendiyl backbone (fcCAACs) and studying them in terms of their steric and electronic properties as well as their reactivity. Differences with respect to established CAACs will be of particular interest. According to our hypothesis, fcCAACs will exhibit a particularly pronounced ambiphilicity, and hence particularly high reactivity. Consequently, we will specifically study their capability for small-molecule activation – a task where fcCAACs are expected to be superior to established CAACs. Furthermore, we surmise that the ability for stabilizing (metallo-)radicals, which is typical for CAACs, may be strengthened markedly by the presence of the redox-active 1,1’-ferrocenediyl backbone, giving access to novel stable oligoradicals.