پنتابوران

Also known as pentaboron nonahydride, nonahydropentaborane, (2,3-muH),(2,5-muH),(3,4-muH),(4,5-muH)-nido-pentaborane(9), pentaborane

Pentaborane(9) is an inorganic compound with the formula . It is one of the most common boron hydride clusters, although it is a highly reactive compound. Because of its high reactivity with oxygen, it was once evaluated as rocket or jet fuel. Like many of the smaller boron hydrides, pentaborane is colourless, diamagnetic, and volatile. It is related to pentaborane(11) ().