Stable Planar Six-π-Electron Six-Membered N-Heterocyclic Carbenes with Tunable Electronic Properties

摘要

Carbene analogues of borazines are readily available as highly thermally stable species [mp 176℃ without decomposition (7c)]. They give rise to stable transition metal complexes. Importantly, their electronic properties can readily be tuned by varying the nature of the boron substituents. Their efficiency as organic catalysts and as ligands for transition metal catalysts is currently under investigation.