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Synthesis of 9-borafluorene analogues featuring a three-dimensional 1,1′-bis(o-carborane) backbone
- Yruegas, Sam, Axtell, Jonathan C., Kirlikovali, Kent O., Spokoyny, Alexander M., Martin, Caleb D.
- Chemical communications 2019 v.55 no.20 pp. 2892-2895
- X-ray diffraction, acidity, biphenyl, boranes, boron, deprotonation
- The synthesis of [1,1′-bis(o-carboranyl)]boranes was achieved through the deprotonation of 1,1′-bis(o-carborane) reagents followed by salt metathesis with (ⁱPr)₂NBCl₂. X-ray crystallography confirms planar central BC₄ rings and Gutmann–Beckett studies reveal an increase in Lewis acidity at the boron center in comparison to their biphenyl congener, 9-borafluorene.