In chemistry, an oxoborane is any chemical compound containing a boron atom with a terminal oxygen atom (a −B=O functional group). The compound class is of some relevance to academic research. The parent compound, HBO, itself called "oxoborane", together with derivatives FBO, ClBO, BrBO, HOBO and MeBO have been detected in matrix isolation or in the gaseous phase at high temperature. [1][2] In these compounds the boron and oxygen form a triple bond prone to cyclotrimerization to boroxines.