Abstract
Formal reduction of (2-bromophenyl)chloro(2,2′′,4,4′′,6,6′′-hexaisopropyl-[1,1′:3′,1′′-terphenyl]-2′-yl)borane with tert-butyl lithium at low temperatures yields a highly strained benzoborirene that is kinetically stabilized by the bulky terphenyl substituent. The target compound withstands heating to 80 °C, and represents the first benzoborirene fully characterized by single-crystal X-ray crystallography. The bond length pattern of the six-membered ring of the parent benzoborirene follows an anti-Mills–Nixon distortion.
- This article is part of the themed collection: Boron Chemistry in the 21st Century: From Synthetic Curiosities to Functional Molecules
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