While small carbocyclic rings have long been recognized as pivotal building blocks in chemistry, their all-boron counterparts have remained largely unexplored. Here, the authors present a detailed account for the functionalization reactivity of cyclic tetraborane B4(NCy2)4 (Cy = cyclohexyl) encompassing both ring-expansion and ring-opening reactions.
- Eva Beck
- Diana Bröllos
- Holger Braunschweig
