The chemistry of the undecaborates

The formation, structure, and reactivity of the nido-11-vertex species B11H15, B11H14−, B11H132−, B11H123− and of the closo-12-vertex species B11H12−, B11H112− are reviewed. The reactivity includes the behavior towards acids, bases, and oxidants as well as cluster expansion reactions, giving closo-11-vertex species of the type EB11H11n− or [B11H11M]n−.