Tags: Chemical Compound, Chemical Substance.
Pentaborane also called pentaborane(9) to distinguish it from B5H11 is an inorganic compound with the formula B5H9. It is one of the most common boron hydride clusters although it is a highly reactive compound. Because of its high reactivity toward oxygen it was once evaluated as rocket or jet fuel. Like many of the smaller boron hydrides pentaborane is colourless diamagnetic and volatile.
