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- Title
Stable Boron Dithiolene Radicals.
- Authors
Wang, Yuzhong; Xie, Yaoming; Wei, Pingrong; Blair, Soshawn A.; Cui, Dongtao; Johnson, Michael K.; Schaefer, III, Henry F.; Robinson, Gregory H.
- Abstract
Abstract: Whereas low‐temperature (−78 °C) reaction of the lithium dithiolene radical 1. with boron bromide gives the dibromoboron dithiolene radical 2., the parallel reaction of 1. with (C6H11)2BCl (0 °C) affords the dicyclohexylboron dithiolene radical 3.. Radicals 2. and 3. were characterized by single‐crystal X‐ray diffraction, UV/Vis, and EPR spectroscopy. The nature of these radicals was also probed computationally. Under mild conditions, 3. undergoes unexpected thiourea‐mediated B−C bond activation to give zwitterion 4, which may be regarded as an anionic dithiolene‐modified carbene complex of the sulfenyl cation RS+ (R=cyclohexyl).
- Subjects
BORON bromides; X-ray diffraction; DITHIOLENES; X-ray absorption spectra; ELECTRON paramagnetic resonance spectroscopy
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 26, p7991
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201804298