Q: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
The Corey-Bakshi-Shibata catalyst contains a toluene molecule bound to one of these atoms, and the reducing agent L-selectride contains lithium and this element. Acids of this element react with alkyl halides in the Suzuki coupling, and complexes of this element adopt closo, nido, and arachno configurations according to Wade's rules. 9-BBN contains this element, and another reaction that uses it was developed by Herbert Brown and is a counterpart to oxymercuration that violates Markovnikov's rule. FTP, name this electron deficient element whose sodium hydride is a common reducing agent, with atomic number 5 and symbol B.
A:
Science