Theoretische Untersuchungen von anorganischen, biradikalischen Borverbindungen mit einer einzigartigen Struktur

In this work, biradical boron containing systems with various structures are investigated to reveal the dependency of the biradical character on the ligated carbene (NHC, CAAC) and the related steric demands of the substituents.In dieser Arbeit werden biradikalische Bor-Systeme mit unterschiedlichen Strukturen untersucht, um die Abhängigkeit des biradikalischen Charakter von der Carben-Einheit, die am Bor (NHC, CAAC) gebunden ist, und den sterischen Anspruch der Substituenten zu analysieren

Isolation of diborenes and their 90°-twisted diradical congeners

Molecules containing multiple bonds between atoms—most often in the form of olefins—are ubiquitous in nature, commerce, and science, and as such have a huge impact on everyday life. Given their prominence, over the last few decades, frequent attempts have been made to perturb the structure and reactivity of multiply-bound species through bending and twisting. However, only modest success has been achieved in the quest to completely twist double bonds in order to homolytically cleave the associated π bond. Here, we present the isolation of double-bond-containing species based on boron, as well as their fully twisted diradical congeners, by the incorporation of attached groups with different electronic properties. The compounds comprise a structurally authenticated set of diamagnetic multiply-bound and diradical singly-bound congeners of the same class of compound

Isolation of diradical products of twisted double bonds

Molecules containing multiple bonds between atoms—most often in the form of olefins—are ubiquitous in nature, commerce, and science, and as such have a huge impact on everyday life. Given their prominence, over the last few decades, frequent attempts have been made to perturb the structure and reactivity of multiply-bound species through bending and twisting. However, only modest success has been achieved in the quest to completely twist double bonds in order to homolytically cleave the associated π bond. Here, we present the isolation of double-bond-containing species based on boron, as well as their fully twisted diradical congeners, by the incorporation of attached groups with different electronic properties. The compounds comprise a structurally authenticated set of diamagnetic multiply-bound and diradical singly-bound congeners of the same class of compound